diff --git a/Applications/Browser/InspectorWidget.cpp b/Applications/Browser/InspectorWidget.cpp
index 914e43571c..024d192f4f 100644
--- a/Applications/Browser/InspectorWidget.cpp
+++ b/Applications/Browser/InspectorWidget.cpp
@@ -41,13 +41,13 @@ InspectorWidget::InspectorWidget()
     auto& splitter = add<GUI::VerticalSplitter>();
     m_dom_tree_view = splitter.add<GUI::TreeView>();
     m_dom_tree_view->on_selection = [this](auto& index) {
-        auto* node = static_cast<Node*>(index.internal_data());
+        auto* node = static_cast<Web::Node*>(index.internal_data());
         node->document().set_inspected_node(node);
         if (node->is_element()) {
-            auto element = to<Element>(*node);
+            auto element = Web::to<Web::Element>(*node);
             if (element.resolved_style()) {
-                m_style_table_view->set_model(StylePropertiesModel::create(*element.resolved_style()));
-                m_computed_style_table_view->set_model(StylePropertiesModel::create(*element.computed_style()));
+                m_style_table_view->set_model(Web::StylePropertiesModel::create(*element.resolved_style()));
+                m_computed_style_table_view->set_model(Web::StylePropertiesModel::create(*element.computed_style()));
             }
         } else {
             m_style_table_view->set_model(nullptr);
@@ -68,10 +68,10 @@ InspectorWidget::~InspectorWidget()
 {
 }
 
-void InspectorWidget::set_document(Document* document)
+void InspectorWidget::set_document(Web::Document* document)
 {
     if (m_document == document)
         return;
     m_document = document;
-    m_dom_tree_view->set_model(DOMTreeModel::create(*document));
+    m_dom_tree_view->set_model(Web::DOMTreeModel::create(*document));
 }
diff --git a/Applications/Browser/InspectorWidget.h b/Applications/Browser/InspectorWidget.h
index 571b3acab1..de03e007a6 100644
--- a/Applications/Browser/InspectorWidget.h
+++ b/Applications/Browser/InspectorWidget.h
@@ -25,15 +25,14 @@
  */
 
 #include <LibGUI/Widget.h>
-
-class Document;
+#include <LibHTML/Forward.h>
 
 class InspectorWidget final : public GUI::Widget {
     C_OBJECT(InspectorWidget)
 public:
     virtual ~InspectorWidget();
 
-    void set_document(Document*);
+    void set_document(Web::Document*);
 
 private:
     InspectorWidget();
@@ -41,5 +40,5 @@ private:
     RefPtr<GUI::TreeView> m_dom_tree_view;
     RefPtr<GUI::TableView> m_style_table_view;
     RefPtr<GUI::TableView> m_computed_style_table_view;
-    RefPtr<Document> m_document;
+    RefPtr<Web::Document> m_document;
 };
diff --git a/Applications/Browser/main.cpp b/Applications/Browser/main.cpp
index ecbaa154cf..92c3ceac7e 100644
--- a/Applications/Browser/main.cpp
+++ b/Applications/Browser/main.cpp
@@ -64,7 +64,7 @@ int main(int argc, char** argv)
     GUI::Application app(argc, argv);
 
     // Connect to the ProtocolServer immediately so we can drop the "unix" pledge.
-    ResourceLoader::the();
+    Web::ResourceLoader::the();
 
     if (pledge("stdio shared_buffer accept rpath", nullptr) < 0) {
         perror("pledge");
@@ -81,7 +81,7 @@ int main(int argc, char** argv)
     widget.layout()->set_spacing(0);
 
     auto& toolbar = widget.add<GUI::ToolBar>();
-    auto& html_widget = widget.add<HtmlView>();
+    auto& html_widget = widget.add<Web::HtmlView>();
 
     History<URL> history;
 
@@ -157,12 +157,12 @@ int main(int argc, char** argv)
         statusbar.set_text(href);
     };
 
-    ResourceLoader::the().on_load_counter_change = [&] {
-        if (ResourceLoader::the().pending_loads() == 0) {
+    Web::ResourceLoader::the().on_load_counter_change = [&] {
+        if (Web::ResourceLoader::the().pending_loads() == 0) {
             statusbar.set_text("");
             return;
         }
-        statusbar.set_text(String::format("Loading (%d pending resources...)", ResourceLoader::the().pending_loads()));
+        statusbar.set_text(String::format("Loading (%d pending resources...)", Web::ResourceLoader::the().pending_loads()));
     };
 
     auto menubar = make<GUI::MenuBar>();
diff --git a/Applications/Help/main.cpp b/Applications/Help/main.cpp
index c058ecdd25..cb640633ff 100644
--- a/Applications/Help/main.cpp
+++ b/Applications/Help/main.cpp
@@ -93,7 +93,7 @@ int main(int argc, char* argv[])
     tree_view.set_size_policy(GUI::SizePolicy::Fixed, GUI::SizePolicy::Fill);
     tree_view.set_preferred_size(200, 500);
 
-    auto& html_view = splitter.add<HtmlView>();
+    auto& html_view = splitter.add<Web::HtmlView>();
 
     History history;
 
@@ -129,7 +129,7 @@ int main(int argc, char* argv[])
         ASSERT(success);
 
         String html = md_document.render_to_html();
-        auto html_document = parse_html_document(html);
+        auto html_document = Web::parse_html_document(html);
         html_view.set_document(html_document);
 
         String page_and_section = model->page_and_section(tree_view.selection().first());
diff --git a/Applications/IRCClient/IRCLogBuffer.cpp b/Applications/IRCClient/IRCLogBuffer.cpp
index 81abb98376..aefc0db836 100644
--- a/Applications/IRCClient/IRCLogBuffer.cpp
+++ b/Applications/IRCClient/IRCLogBuffer.cpp
@@ -43,14 +43,14 @@ NonnullRefPtr<IRCLogBuffer> IRCLogBuffer::create()
 
 IRCLogBuffer::IRCLogBuffer()
 {
-    m_document = adopt(*new Document);
-    m_document->append_child(adopt(*new DocumentType(document())));
+    m_document = adopt(*new Web::Document);
+    m_document->append_child(adopt(*new Web::DocumentType(document())));
     auto html_element = create_element(document(), "html");
     m_document->append_child(html_element);
     auto head_element = create_element(document(), "head");
     html_element->append_child(head_element);
     auto style_element = create_element(document(), "style");
-    style_element->append_child(adopt(*new Text(document(), "div { font-family: Csilla; font-weight: lighter; }")));
+    style_element->append_child(adopt(*new Web::Text(document(), "div { font-family: Csilla; font-weight: lighter; }")));
     head_element->append_child(style_element);
     auto body_element = create_element(document(), "body");
     html_element->append_child(body_element);
diff --git a/Applications/IRCClient/IRCLogBuffer.h b/Applications/IRCClient/IRCLogBuffer.h
index d1c7c54041..4cef97a77d 100644
--- a/Applications/IRCClient/IRCLogBuffer.h
+++ b/Applications/IRCClient/IRCLogBuffer.h
@@ -49,11 +49,11 @@ public:
     void add_message(const String& text, Color = Color::Black);
     void dump() const;
 
-    const Document& document() const { return *m_document; }
-    Document& document() { return *m_document; }
+    const Web::Document& document() const { return *m_document; }
+    Web::Document& document() { return *m_document; }
 
 private:
     IRCLogBuffer();
-    RefPtr<Document> m_document;
-    RefPtr<Element> m_container_element;
+    RefPtr<Web::Document> m_document;
+    RefPtr<Web::Element> m_container_element;
 };
diff --git a/Applications/IRCClient/IRCWindow.cpp b/Applications/IRCClient/IRCWindow.cpp
index a47525da8e..1994f1e059 100644
--- a/Applications/IRCClient/IRCWindow.cpp
+++ b/Applications/IRCClient/IRCWindow.cpp
@@ -46,7 +46,7 @@ IRCWindow::IRCWindow(IRCClient& client, void* owner, Type type, const String& na
     // Make a container for the log buffer view + (optional) member list.
     auto& container = add<GUI::HorizontalSplitter>();
 
-    m_html_view = container.add<HtmlView>();
+    m_html_view = container.add<Web::HtmlView>();
 
     if (m_type == Channel) {
         auto& member_view = container.add<GUI::TableView>();
@@ -82,7 +82,7 @@ IRCWindow::~IRCWindow()
 void IRCWindow::set_log_buffer(const IRCLogBuffer& log_buffer)
 {
     m_log_buffer = &log_buffer;
-    m_html_view->set_document(const_cast<Document*>(&log_buffer.document()));
+    m_html_view->set_document(const_cast<Web::Document*>(&log_buffer.document()));
 }
 
 bool IRCWindow::is_active() const
diff --git a/Applications/IRCClient/IRCWindow.h b/Applications/IRCClient/IRCWindow.h
index 319184dd85..c8189fee63 100644
--- a/Applications/IRCClient/IRCWindow.h
+++ b/Applications/IRCClient/IRCWindow.h
@@ -27,12 +27,12 @@
 #pragma once
 
 #include <LibGUI/Widget.h>
+#include <LibHTML/Forward.h>
 
 class IRCChannel;
 class IRCClient;
 class IRCQuery;
 class IRCLogBuffer;
-class HtmlView;
 
 class IRCWindow : public GUI::Widget {
     C_OBJECT(IRCWindow)
@@ -72,7 +72,7 @@ private:
     void* m_owner { nullptr };
     Type m_type;
     String m_name;
-    RefPtr<HtmlView> m_html_view;
+    RefPtr<Web::HtmlView> m_html_view;
     RefPtr<GUI::TextEditor> m_text_editor;
     RefPtr<IRCLogBuffer> m_log_buffer;
     int m_unread_count { 0 };
diff --git a/DevTools/HackStudio/Editor.cpp b/DevTools/HackStudio/Editor.cpp
index d43d0e5ede..b2a725c5ec 100644
--- a/DevTools/HackStudio/Editor.cpp
+++ b/DevTools/HackStudio/Editor.cpp
@@ -48,7 +48,7 @@ Editor::Editor()
     m_documentation_tooltip_window = GUI::Window::construct();
     m_documentation_tooltip_window->set_rect(0, 0, 500, 400);
     m_documentation_tooltip_window->set_window_type(GUI::WindowType::Tooltip);
-    m_documentation_html_view = m_documentation_tooltip_window->set_main_widget<HtmlView>();
+    m_documentation_html_view = m_documentation_tooltip_window->set_main_widget<Web::HtmlView>();
 }
 
 Editor::~Editor()
@@ -145,7 +145,7 @@ void Editor::show_documentation_tooltip_if_available(const String& hovered_token
 
     auto html_text = man_document.render_to_html();
 
-    auto html_document = parse_html_document(html_text);
+    auto html_document = Web::parse_html_document(html_text);
     if (!html_document) {
         dbg() << "failed to parse HTML";
         return;
@@ -153,10 +153,10 @@ void Editor::show_documentation_tooltip_if_available(const String& hovered_token
 
     // FIXME: LibHTML needs a friendlier DOM manipulation API. Something like innerHTML :^)
     auto style_element = create_element(*html_document, "style");
-    style_element->append_child(adopt(*new Text(*html_document, "body { background-color: #dac7b5; }")));
+    style_element->append_child(adopt(*new Web::Text(*html_document, "body { background-color: #dac7b5; }")));
 
     // FIXME: This const_cast should not be necessary.
-    auto* head_element = const_cast<HTMLHeadElement*>(html_document->head());
+    auto* head_element = const_cast<Web::HTMLHeadElement*>(html_document->head());
     ASSERT(head_element);
     head_element->append_child(style_element);
 
diff --git a/DevTools/HackStudio/Editor.h b/DevTools/HackStudio/Editor.h
index cd1fa0693e..3df2f8816f 100644
--- a/DevTools/HackStudio/Editor.h
+++ b/DevTools/HackStudio/Editor.h
@@ -27,9 +27,9 @@
 #pragma once
 
 #include <LibGUI/TextEditor.h>
+#include <LibHTML/Forward.h>
 
 class EditorWrapper;
-class HtmlView;
 
 class Editor final : public GUI::TextEditor {
     C_OBJECT(Editor)
@@ -52,6 +52,6 @@ private:
     explicit Editor();
 
     RefPtr<GUI::Window> m_documentation_tooltip_window;
-    RefPtr<HtmlView> m_documentation_html_view;
+    RefPtr<Web::HtmlView> m_documentation_html_view;
     String m_last_parsed_token;
 };
diff --git a/Kernel/VM/Region.cpp b/Kernel/VM/Region.cpp
index be4597803d..de81f750bb 100644
--- a/Kernel/VM/Region.cpp
+++ b/Kernel/VM/Region.cpp
@@ -309,7 +309,8 @@ PageFaultResponse Region::handle_fault(const PageFault& fault)
         }
         return handle_zero_fault(page_index_in_region);
 #else
-        ASSERT_NOT_REACHED();
+        dbg() << "BUG! Unexpected NP fault at " << fault.vaddr();
+        return PageFaultResponse::ShouldCrash;
 #endif
     }
     ASSERT(fault.type() == PageFault::Type::ProtectionViolation);
diff --git a/Libraries/LibC/libcinit.cpp b/Libraries/LibC/libcinit.cpp
index a206fc5c18..8aba7a62b5 100644
--- a/Libraries/LibC/libcinit.cpp
+++ b/Libraries/LibC/libcinit.cpp
@@ -50,7 +50,7 @@ void __libc_init()
 }
 
 extern u32 __stack_chk_guard;
-u32 __stack_chk_guard = (u32)0xc0000c13;
+u32 __stack_chk_guard = (u32)0xc6c7c8c9;
 
 [[noreturn]] void __stack_chk_fail()
 {
diff --git a/Libraries/LibHTML/CSS/Length.h b/Libraries/LibHTML/CSS/Length.h
index 219d8b69b0..612c1cf49f 100644
--- a/Libraries/LibHTML/CSS/Length.h
+++ b/Libraries/LibHTML/CSS/Length.h
@@ -28,6 +28,8 @@
 
 #include <AK/String.h>
 
+namespace Web {
+
 class Length {
 public:
     enum class Type {
@@ -76,3 +78,5 @@ inline const LogStream& operator<<(const LogStream& stream, const Length& value)
 {
     return stream << value.to_string();
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/LengthBox.h b/Libraries/LibHTML/CSS/LengthBox.h
index a87b128ec6..1ab356ff50 100644
--- a/Libraries/LibHTML/CSS/LengthBox.h
+++ b/Libraries/LibHTML/CSS/LengthBox.h
@@ -28,9 +28,13 @@
 
 #include <LibHTML/CSS/Length.h>
 
+namespace Web {
+
 struct LengthBox {
     Length top;
     Length right;
     Length bottom;
     Length left;
 };
+
+}
diff --git a/Libraries/LibHTML/CSS/Selector.cpp b/Libraries/LibHTML/CSS/Selector.cpp
index dc4a0d1ea8..064fe15984 100644
--- a/Libraries/LibHTML/CSS/Selector.cpp
+++ b/Libraries/LibHTML/CSS/Selector.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/CSS/Selector.h>
 
+namespace Web {
+
 Selector::Selector(Vector<ComplexSelector>&& component_lists)
     : m_complex_selectors(move(component_lists))
 {
@@ -61,3 +63,5 @@ Specificity Selector::specificity() const
 
     return { ids, classes, tag_names };
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/Selector.h b/Libraries/LibHTML/CSS/Selector.h
index 3ae949615d..979080a187 100644
--- a/Libraries/LibHTML/CSS/Selector.h
+++ b/Libraries/LibHTML/CSS/Selector.h
@@ -30,6 +30,8 @@
 #include <AK/Vector.h>
 #include <LibHTML/CSS/Specificity.h>
 
+namespace Web {
+
 class Selector {
 public:
     struct SimpleSelector {
@@ -90,3 +92,5 @@ public:
 private:
     Vector<ComplexSelector> m_complex_selectors;
 };
+
+}
diff --git a/Libraries/LibHTML/CSS/SelectorEngine.cpp b/Libraries/LibHTML/CSS/SelectorEngine.cpp
index b541985850..e9f46a3fee 100644
--- a/Libraries/LibHTML/CSS/SelectorEngine.cpp
+++ b/Libraries/LibHTML/CSS/SelectorEngine.cpp
@@ -29,6 +29,8 @@
 #include <LibHTML/DOM/Element.h>
 #include <LibHTML/DOM/Text.h>
 
+namespace Web {
+
 namespace SelectorEngine {
 
 static bool matches_hover_pseudo_class(const Element& element)
@@ -146,3 +148,5 @@ bool matches(const Selector& selector, const Element& element)
 }
 
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/SelectorEngine.h b/Libraries/LibHTML/CSS/SelectorEngine.h
index e625b8a418..8017697ad1 100644
--- a/Libraries/LibHTML/CSS/SelectorEngine.h
+++ b/Libraries/LibHTML/CSS/SelectorEngine.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/CSS/Selector.h>
 
+namespace Web {
+
 class Element;
 
 namespace SelectorEngine {
@@ -35,3 +37,5 @@ namespace SelectorEngine {
 bool matches(const Selector&, const Element&);
 
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/Specificity.h b/Libraries/LibHTML/CSS/Specificity.h
index 7a6887eb20..360a7f852b 100644
--- a/Libraries/LibHTML/CSS/Specificity.h
+++ b/Libraries/LibHTML/CSS/Specificity.h
@@ -26,6 +26,8 @@
 
 #pragma once
 
+namespace Web {
+
 class Specificity {
 public:
     Specificity(unsigned ids, unsigned classes, unsigned tag_names)
@@ -58,3 +60,5 @@ private:
     unsigned m_classes { 0 };
     unsigned m_tag_names { 0 };
 };
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleDeclaration.cpp b/Libraries/LibHTML/CSS/StyleDeclaration.cpp
index 259d674d8c..0ffd87beee 100644
--- a/Libraries/LibHTML/CSS/StyleDeclaration.cpp
+++ b/Libraries/LibHTML/CSS/StyleDeclaration.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/CSS/StyleDeclaration.h>
 
+namespace Web {
+
 StyleDeclaration::StyleDeclaration(Vector<StyleProperty>&& properties)
     : m_properties(move(properties))
 {
@@ -34,3 +36,5 @@ StyleDeclaration::StyleDeclaration(Vector<StyleProperty>&& properties)
 StyleDeclaration::~StyleDeclaration()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleDeclaration.h b/Libraries/LibHTML/CSS/StyleDeclaration.h
index ebe8a6d3ca..9ef3db3372 100644
--- a/Libraries/LibHTML/CSS/StyleDeclaration.h
+++ b/Libraries/LibHTML/CSS/StyleDeclaration.h
@@ -30,6 +30,8 @@
 #include <AK/Vector.h>
 #include <LibHTML/CSS/StyleValue.h>
 
+namespace Web {
+
 struct StyleProperty {
     CSS::PropertyID property_id;
     NonnullRefPtr<StyleValue> value;
@@ -52,3 +54,5 @@ public:
 
     Vector<StyleProperty> m_properties;
 };
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleProperties.cpp b/Libraries/LibHTML/CSS/StyleProperties.cpp
index 4b6835d03d..645f180d22 100644
--- a/Libraries/LibHTML/CSS/StyleProperties.cpp
+++ b/Libraries/LibHTML/CSS/StyleProperties.cpp
@@ -29,6 +29,8 @@
 #include <LibHTML/FontCache.h>
 #include <ctype.h>
 
+namespace Web {
+
 StyleProperties::StyleProperties()
 {
 }
@@ -177,3 +179,5 @@ bool StyleProperties::operator==(const StyleProperties& other) const
 
     return true;
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleProperties.h b/Libraries/LibHTML/CSS/StyleProperties.h
index 0ab63fd2c5..9540eba3da 100644
--- a/Libraries/LibHTML/CSS/StyleProperties.h
+++ b/Libraries/LibHTML/CSS/StyleProperties.h
@@ -32,6 +32,8 @@
 #include <LibGfx/Forward.h>
 #include <LibHTML/CSS/StyleValue.h>
 
+namespace Web {
+
 class StyleProperties : public RefCounted<StyleProperties> {
 public:
     StyleProperties();
@@ -75,3 +77,5 @@ private:
 
     mutable RefPtr<Gfx::Font> m_font;
 };
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleResolver.cpp b/Libraries/LibHTML/CSS/StyleResolver.cpp
index 958e7cb6b3..347cd6cefc 100644
--- a/Libraries/LibHTML/CSS/StyleResolver.cpp
+++ b/Libraries/LibHTML/CSS/StyleResolver.cpp
@@ -34,6 +34,8 @@
 #include <ctype.h>
 #include <stdio.h>
 
+namespace Web {
+
 StyleResolver::StyleResolver(Document& document)
     : m_document(document)
 {
@@ -294,3 +296,5 @@ NonnullRefPtr<StyleProperties> StyleResolver::resolve_style(const Element& eleme
 
     return style;
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleResolver.h b/Libraries/LibHTML/CSS/StyleResolver.h
index b1ab5d689b..325fef496d 100644
--- a/Libraries/LibHTML/CSS/StyleResolver.h
+++ b/Libraries/LibHTML/CSS/StyleResolver.h
@@ -30,6 +30,8 @@
 #include <AK/OwnPtr.h>
 #include <LibHTML/CSS/StyleProperties.h>
 
+namespace Web {
+
 class Document;
 class Element;
 class ParentNode;
@@ -56,3 +58,5 @@ private:
 
     Document& m_document;
 };
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleRule.cpp b/Libraries/LibHTML/CSS/StyleRule.cpp
index f34a0c91d5..5fddcb5d2c 100644
--- a/Libraries/LibHTML/CSS/StyleRule.cpp
+++ b/Libraries/LibHTML/CSS/StyleRule.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/CSS/StyleRule.h>
 
+namespace Web {
+
 StyleRule::StyleRule(Vector<Selector>&& selectors, NonnullRefPtr<StyleDeclaration>&& declaration)
     : m_selectors(move(selectors))
     , m_declaration(move(declaration))
@@ -35,3 +37,5 @@ StyleRule::StyleRule(Vector<Selector>&& selectors, NonnullRefPtr<StyleDeclaratio
 StyleRule::~StyleRule()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleRule.h b/Libraries/LibHTML/CSS/StyleRule.h
index 6b2d1ea53a..4bce75e293 100644
--- a/Libraries/LibHTML/CSS/StyleRule.h
+++ b/Libraries/LibHTML/CSS/StyleRule.h
@@ -30,6 +30,8 @@
 #include <LibHTML/CSS/Selector.h>
 #include <LibHTML/CSS/StyleDeclaration.h>
 
+namespace Web {
+
 class StyleRule : public RefCounted<StyleRule> {
 public:
     static NonnullRefPtr<StyleRule> create(Vector<Selector>&& selectors, NonnullRefPtr<StyleDeclaration>&& declaration)
@@ -48,3 +50,5 @@ private:
     Vector<Selector> m_selectors;
     NonnullRefPtr<StyleDeclaration> m_declaration;
 };
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleSheet.cpp b/Libraries/LibHTML/CSS/StyleSheet.cpp
index c9d4dc1f79..092abf7e10 100644
--- a/Libraries/LibHTML/CSS/StyleSheet.cpp
+++ b/Libraries/LibHTML/CSS/StyleSheet.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/CSS/StyleSheet.h>
 
+namespace Web {
+
 StyleSheet::StyleSheet(NonnullRefPtrVector<StyleRule>&& rules)
     : m_rules(move(rules))
 {
@@ -34,3 +36,5 @@ StyleSheet::StyleSheet(NonnullRefPtrVector<StyleRule>&& rules)
 StyleSheet::~StyleSheet()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleSheet.h b/Libraries/LibHTML/CSS/StyleSheet.h
index 0f415804cb..0646c25e24 100644
--- a/Libraries/LibHTML/CSS/StyleSheet.h
+++ b/Libraries/LibHTML/CSS/StyleSheet.h
@@ -29,6 +29,8 @@
 #include <AK/NonnullRefPtrVector.h>
 #include <LibHTML/CSS/StyleRule.h>
 
+namespace Web {
+
 class StyleSheet : public RefCounted<StyleSheet> {
 public:
     static NonnullRefPtr<StyleSheet> create(NonnullRefPtrVector<StyleRule>&& rules)
@@ -45,3 +47,5 @@ private:
 
     NonnullRefPtrVector<StyleRule> m_rules;
 };
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleValue.cpp b/Libraries/LibHTML/CSS/StyleValue.cpp
index 0a19807c81..6cc4f087d0 100644
--- a/Libraries/LibHTML/CSS/StyleValue.cpp
+++ b/Libraries/LibHTML/CSS/StyleValue.cpp
@@ -32,6 +32,8 @@
 #include <LibHTML/Frame.h>
 #include <LibHTML/ResourceLoader.h>
 
+namespace Web {
+
 StyleValue::StyleValue(Type type)
     : m_type(type)
 {
@@ -76,3 +78,5 @@ ImageStyleValue::ImageStyleValue(const URL& url, Document& document)
         m_document->frame()->set_needs_display({});
     });
 }
+
+}
diff --git a/Libraries/LibHTML/CSS/StyleValue.h b/Libraries/LibHTML/CSS/StyleValue.h
index b65677af0a..6dd1a3463d 100644
--- a/Libraries/LibHTML/CSS/StyleValue.h
+++ b/Libraries/LibHTML/CSS/StyleValue.h
@@ -37,6 +37,8 @@
 #include <LibHTML/CSS/Length.h>
 #include <LibHTML/CSS/PropertyID.h>
 
+namespace Web {
+
 class Document;
 
 namespace CSS {
@@ -222,3 +224,5 @@ private:
     WeakPtr<Document> m_document;
     RefPtr<Gfx::Bitmap> m_bitmap;
 };
+
+}
diff --git a/Libraries/LibHTML/CodeGenerators/Generate_CSS_PropertyID_cpp/Generate_CSS_PropertyID_cpp.cpp b/Libraries/LibHTML/CodeGenerators/Generate_CSS_PropertyID_cpp/Generate_CSS_PropertyID_cpp.cpp
index c8370ce700..c3491bbd32 100644
--- a/Libraries/LibHTML/CodeGenerators/Generate_CSS_PropertyID_cpp/Generate_CSS_PropertyID_cpp.cpp
+++ b/Libraries/LibHTML/CodeGenerators/Generate_CSS_PropertyID_cpp/Generate_CSS_PropertyID_cpp.cpp
@@ -60,6 +60,7 @@ int main(int argc, char** argv)
 
     dbg() << "#include <AK/Assertions.h>";
     dbg() << "#include <LibHTML/CSS/PropertyID.h>";
+    dbg() << "namespace Web {";
     dbg() << "namespace CSS {";
 
     dbg() << "PropertyID property_id_from_string(const StringView& string) {";
@@ -86,6 +87,7 @@ int main(int argc, char** argv)
     dbg() << "    }";
     dbg() << "}";
     dbg() << "}";
+    dbg() << "}";
 
     return 0;
 }
diff --git a/Libraries/LibHTML/CodeGenerators/Generate_CSS_PropertyID_h/Generate_CSS_PropertyID_h.cpp b/Libraries/LibHTML/CodeGenerators/Generate_CSS_PropertyID_h/Generate_CSS_PropertyID_h.cpp
index 4b0973fe0a..8ebe39deee 100644
--- a/Libraries/LibHTML/CodeGenerators/Generate_CSS_PropertyID_h/Generate_CSS_PropertyID_h.cpp
+++ b/Libraries/LibHTML/CodeGenerators/Generate_CSS_PropertyID_h/Generate_CSS_PropertyID_h.cpp
@@ -62,6 +62,7 @@ int main(int argc, char** argv)
     dbg() << "#include <AK/StringView.h>";
     dbg() << "#include <AK/Traits.h>";
 
+    dbg() << "namespace Web {";
     dbg() << "namespace CSS {";
     dbg() << "enum class PropertyID {";
     dbg() << "    Invalid,";
@@ -75,11 +76,12 @@ int main(int argc, char** argv)
 PropertyID property_id_from_string(const StringView&);\n\
 const char* string_from_property_id(PropertyID);\n\
 }\n\
+}\n\
 \n\
 namespace AK {\n\
 template<>\n\
-struct Traits<CSS::PropertyID> : public GenericTraits<CSS::PropertyID> {\n\
-    static unsigned hash(CSS::PropertyID property_id) { return int_hash((unsigned)property_id); }\n\
+struct Traits<Web::CSS::PropertyID> : public GenericTraits<Web::CSS::PropertyID> {\n\
+    static unsigned hash(Web::CSS::PropertyID property_id) { return int_hash((unsigned)property_id); }\n\
 };\n\
 }\n";
 
diff --git a/Libraries/LibHTML/DOM/CharacterData.cpp b/Libraries/LibHTML/DOM/CharacterData.cpp
index 5af2d39fb0..83b14fb54a 100644
--- a/Libraries/LibHTML/DOM/CharacterData.cpp
+++ b/Libraries/LibHTML/DOM/CharacterData.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/DOM/CharacterData.h>
 
+namespace Web {
+
 CharacterData::CharacterData(Document& document, NodeType type, const String& data)
     : Node(document, type)
     , m_data(data)
@@ -35,3 +37,5 @@ CharacterData::CharacterData(Document& document, NodeType type, const String& da
 CharacterData::~CharacterData()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/CharacterData.h b/Libraries/LibHTML/DOM/CharacterData.h
index 39a8efea56..81533bfaad 100644
--- a/Libraries/LibHTML/DOM/CharacterData.h
+++ b/Libraries/LibHTML/DOM/CharacterData.h
@@ -29,6 +29,8 @@
 #include <AK/String.h>
 #include <LibHTML/DOM/Node.h>
 
+namespace Web {
+
 class CharacterData : public Node {
 public:
     virtual ~CharacterData() override;
@@ -49,3 +51,5 @@ inline bool is<CharacterData>(const Node& node)
 {
     return node.is_character_data();
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Comment.cpp b/Libraries/LibHTML/DOM/Comment.cpp
index 8a2906b03f..18c581a427 100644
--- a/Libraries/LibHTML/DOM/Comment.cpp
+++ b/Libraries/LibHTML/DOM/Comment.cpp
@@ -27,6 +27,8 @@
 #include <LibHTML/DOM/Comment.h>
 #include <LibHTML/Layout/LayoutText.h>
 
+namespace Web {
+
 Comment::Comment(Document& document, const String& data)
     : CharacterData(document, NodeType::COMMENT_NODE, data)
 {
@@ -35,3 +37,5 @@ Comment::Comment(Document& document, const String& data)
 Comment::~Comment()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Comment.h b/Libraries/LibHTML/DOM/Comment.h
index 7e925b8bf3..75bfd215c0 100644
--- a/Libraries/LibHTML/DOM/Comment.h
+++ b/Libraries/LibHTML/DOM/Comment.h
@@ -29,6 +29,8 @@
 #include <AK/String.h>
 #include <LibHTML/DOM/CharacterData.h>
 
+namespace Web {
+
 class Comment final : public CharacterData {
 public:
     explicit Comment(Document&, const String&);
@@ -42,3 +44,5 @@ inline bool is<Comment>(const Node& node)
 {
     return node.is_comment();
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Document.cpp b/Libraries/LibHTML/DOM/Document.cpp
index 5243bf9a5d..ae24ec4dde 100644
--- a/Libraries/LibHTML/DOM/Document.cpp
+++ b/Libraries/LibHTML/DOM/Document.cpp
@@ -43,6 +43,8 @@
 #include <LibHTML/Layout/LayoutTreeBuilder.h>
 #include <stdio.h>
 
+namespace Web {
+
 Document::Document()
     : ParentNode(*this, NodeType::DOCUMENT_NODE)
     , m_style_resolver(make<StyleResolver>(*this))
@@ -329,3 +331,5 @@ Color Document::visited_link_color() const
         return Color::Magenta;
     return frame()->html_view()->palette().visited_link();
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Document.h b/Libraries/LibHTML/DOM/Document.h
index df43e48830..6f7ab80cc0 100644
--- a/Libraries/LibHTML/DOM/Document.h
+++ b/Libraries/LibHTML/DOM/Document.h
@@ -37,6 +37,8 @@
 #include <LibHTML/CSS/StyleSheet.h>
 #include <LibHTML/DOM/ParentNode.h>
 
+namespace Web {
+
 class Frame;
 class HTMLBodyElement;
 class HTMLHtmlElement;
@@ -144,3 +146,5 @@ inline bool is<Document>(const Node& node)
 {
     return node.is_document();
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/DocumentFragment.h b/Libraries/LibHTML/DOM/DocumentFragment.h
index 0852d0ee19..6034819d55 100644
--- a/Libraries/LibHTML/DOM/DocumentFragment.h
+++ b/Libraries/LibHTML/DOM/DocumentFragment.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/ParentNode.h>
 
+namespace Web {
+
 class DocumentFragment : public ParentNode {
 public:
     DocumentFragment(Document& document)
@@ -43,3 +45,5 @@ inline bool is<DocumentFragment>(const Node& node)
 {
     return node.is_document_fragment();
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/DocumentType.cpp b/Libraries/LibHTML/DOM/DocumentType.cpp
index bd7af2019b..43e95e153a 100644
--- a/Libraries/LibHTML/DOM/DocumentType.cpp
+++ b/Libraries/LibHTML/DOM/DocumentType.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/DOM/DocumentType.h>
 
+namespace Web {
+
 DocumentType::DocumentType(Document& document)
     : Node(document, NodeType::DOCUMENT_TYPE_NODE)
 {
@@ -34,3 +36,5 @@ DocumentType::DocumentType(Document& document)
 DocumentType::~DocumentType()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/DocumentType.h b/Libraries/LibHTML/DOM/DocumentType.h
index 8ec070b3d3..60b9871768 100644
--- a/Libraries/LibHTML/DOM/DocumentType.h
+++ b/Libraries/LibHTML/DOM/DocumentType.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/Node.h>
 
+namespace Web {
+
 class DocumentType final : public Node {
 public:
     explicit DocumentType(Document&);
@@ -41,3 +43,5 @@ inline bool is<DocumentType>(const Node& node)
 {
     return node.type() == NodeType::DOCUMENT_TYPE_NODE;
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Element.cpp b/Libraries/LibHTML/DOM/Element.cpp
index 5e19268593..ea35b90d60 100644
--- a/Libraries/LibHTML/DOM/Element.cpp
+++ b/Libraries/LibHTML/DOM/Element.cpp
@@ -37,6 +37,8 @@
 #include <LibHTML/Layout/LayoutTableRow.h>
 #include <LibHTML/Layout/LayoutTreeBuilder.h>
 
+namespace Web {
+
 Element::Element(Document& document, const String& tag_name)
     : ParentNode(document, NodeType::ELEMENT_NODE)
     , m_tag_name(tag_name)
@@ -215,3 +217,5 @@ NonnullRefPtr<StyleProperties> Element::computed_style()
     }
     return properties;
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Element.h b/Libraries/LibHTML/DOM/Element.h
index f13da5153a..6039807e06 100644
--- a/Libraries/LibHTML/DOM/Element.h
+++ b/Libraries/LibHTML/DOM/Element.h
@@ -30,6 +30,8 @@
 #include <LibHTML/DOM/ParentNode.h>
 #include <LibHTML/Layout/LayoutNode.h>
 
+namespace Web {
+
 class LayoutNodeWithStyle;
 
 class Attribute {
@@ -102,3 +104,5 @@ inline bool is<Element>(const Node& node)
 {
     return node.is_element();
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/ElementFactory.cpp b/Libraries/LibHTML/DOM/ElementFactory.cpp
index 88e01530a2..5055fcc658 100644
--- a/Libraries/LibHTML/DOM/ElementFactory.cpp
+++ b/Libraries/LibHTML/DOM/ElementFactory.cpp
@@ -41,6 +41,8 @@
 #include <LibHTML/DOM/HTMLStyleElement.h>
 #include <LibHTML/DOM/HTMLTitleElement.h>
 
+namespace Web {
+
 NonnullRefPtr<Element> create_element(Document& document, const String& tag_name)
 {
     auto lowercase_tag_name = tag_name.to_lowercase();
@@ -82,3 +84,5 @@ NonnullRefPtr<Element> create_element(Document& document, const String& tag_name
     }
     return adopt(*new Element(document, lowercase_tag_name));
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/ElementFactory.h b/Libraries/LibHTML/DOM/ElementFactory.h
index 91b3244392..0a87c672d1 100644
--- a/Libraries/LibHTML/DOM/ElementFactory.h
+++ b/Libraries/LibHTML/DOM/ElementFactory.h
@@ -28,4 +28,8 @@
 
 #include <LibHTML/DOM/Element.h>
 
+namespace Web {
+
 NonnullRefPtr<Element> create_element(Document&, const String& tag_name);
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLAnchorElement.cpp b/Libraries/LibHTML/DOM/HTMLAnchorElement.cpp
index 9e8d3fbc33..b763512d8b 100644
--- a/Libraries/LibHTML/DOM/HTMLAnchorElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLAnchorElement.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/DOM/HTMLAnchorElement.h>
 
+namespace Web {
+
 HTMLAnchorElement::HTMLAnchorElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -34,3 +36,5 @@ HTMLAnchorElement::HTMLAnchorElement(Document& document, const String& tag_name)
 HTMLAnchorElement::~HTMLAnchorElement()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLAnchorElement.h b/Libraries/LibHTML/DOM/HTMLAnchorElement.h
index 21b699099c..8f91354f91 100644
--- a/Libraries/LibHTML/DOM/HTMLAnchorElement.h
+++ b/Libraries/LibHTML/DOM/HTMLAnchorElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLAnchorElement : public HTMLElement {
 public:
     HTMLAnchorElement(Document&, const String& tag_name);
@@ -41,3 +43,5 @@ inline bool is<HTMLAnchorElement>(const Node& node)
 {
     return is<Element>(node) && to<Element>(node).tag_name().to_lowercase() == "a";
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLBRElement.cpp b/Libraries/LibHTML/DOM/HTMLBRElement.cpp
index 28e294cad0..7eb7eb1e90 100644
--- a/Libraries/LibHTML/DOM/HTMLBRElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLBRElement.cpp
@@ -27,6 +27,8 @@
 #include <LibHTML/DOM/HTMLBRElement.h>
 #include <LibHTML/Layout/LayoutBreak.h>
 
+namespace Web {
+
 HTMLBRElement::HTMLBRElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -40,3 +42,5 @@ RefPtr<LayoutNode> HTMLBRElement::create_layout_node(const StyleProperties*) con
 {
     return adopt(*new LayoutBreak(*this));
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLBRElement.h b/Libraries/LibHTML/DOM/HTMLBRElement.h
index 3304fea8fd..21181b9c89 100644
--- a/Libraries/LibHTML/DOM/HTMLBRElement.h
+++ b/Libraries/LibHTML/DOM/HTMLBRElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLBRElement final : public HTMLElement {
 public:
     HTMLBRElement(Document&, const String& tag_name);
@@ -41,3 +43,5 @@ inline bool is<HTMLBRElement>(const Node& node)
 {
     return is<Element>(node) && to<Element>(node).tag_name().to_lowercase() == "br";
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLBlinkElement.cpp b/Libraries/LibHTML/DOM/HTMLBlinkElement.cpp
index 38bdc15cb1..940989c459 100644
--- a/Libraries/LibHTML/DOM/HTMLBlinkElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLBlinkElement.cpp
@@ -30,6 +30,8 @@
 #include <LibHTML/DOM/HTMLBlinkElement.h>
 #include <LibHTML/Layout/LayoutNode.h>
 
+namespace Web {
+
 HTMLBlinkElement::HTMLBlinkElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
     , m_timer(Core::Timer::construct())
@@ -51,3 +53,5 @@ void HTMLBlinkElement::blink()
     layout_node()->set_visible(!layout_node()->is_visible());
     layout_node()->set_needs_display();
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLBlinkElement.h b/Libraries/LibHTML/DOM/HTMLBlinkElement.h
index 3cb5b350d4..cb093ce5d5 100644
--- a/Libraries/LibHTML/DOM/HTMLBlinkElement.h
+++ b/Libraries/LibHTML/DOM/HTMLBlinkElement.h
@@ -29,6 +29,8 @@
 #include <LibCore/Forward.h>
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLBlinkElement : public HTMLElement {
 public:
     HTMLBlinkElement(Document&, const String& tag_name);
@@ -39,3 +41,5 @@ private:
 
     NonnullRefPtr<Core::Timer> m_timer;
 };
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLBodyElement.cpp b/Libraries/LibHTML/DOM/HTMLBodyElement.cpp
index 0068c3846a..62abfd188d 100644
--- a/Libraries/LibHTML/DOM/HTMLBodyElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLBodyElement.cpp
@@ -29,6 +29,8 @@
 #include <LibHTML/DOM/Document.h>
 #include <LibHTML/DOM/HTMLBodyElement.h>
 
+namespace Web {
+
 HTMLBodyElement::HTMLBodyElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -71,3 +73,5 @@ void HTMLBodyElement::parse_attribute(const String& name, const String& value)
             document().set_visited_link_color(color.value());
     }
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLBodyElement.h b/Libraries/LibHTML/DOM/HTMLBodyElement.h
index fc0b8f8c01..1f757cb324 100644
--- a/Libraries/LibHTML/DOM/HTMLBodyElement.h
+++ b/Libraries/LibHTML/DOM/HTMLBodyElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLBodyElement : public HTMLElement {
 public:
     HTMLBodyElement(Document&, const String& tag_name);
@@ -42,3 +44,5 @@ inline bool is<HTMLBodyElement>(const Node& node)
 {
     return is<Element>(node) && to<Element>(node).tag_name().to_lowercase() == "body";
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLElement.cpp b/Libraries/LibHTML/DOM/HTMLElement.cpp
index 058b32ae35..0f1214278c 100644
--- a/Libraries/LibHTML/DOM/HTMLElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLElement.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 HTMLElement::HTMLElement(Document& document, const String& tag_name)
     : Element(document, tag_name)
 {
@@ -34,3 +36,5 @@ HTMLElement::HTMLElement(Document& document, const String& tag_name)
 HTMLElement::~HTMLElement()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLElement.h b/Libraries/LibHTML/DOM/HTMLElement.h
index 813b185ada..912ac898d9 100644
--- a/Libraries/LibHTML/DOM/HTMLElement.h
+++ b/Libraries/LibHTML/DOM/HTMLElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/Element.h>
 
+namespace Web {
+
 class HTMLElement : public Element {
 public:
     HTMLElement(Document&, const String& tag_name);
@@ -44,3 +46,5 @@ inline bool is<HTMLElement>(const Node& node)
 {
     return node.is_html_element();
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLFontElement.cpp b/Libraries/LibHTML/DOM/HTMLFontElement.cpp
index 276cd0db69..9e5ac54558 100644
--- a/Libraries/LibHTML/DOM/HTMLFontElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLFontElement.cpp
@@ -28,6 +28,8 @@
 #include <LibHTML/CSS/StyleValue.h>
 #include <LibHTML/DOM/HTMLFontElement.h>
 
+namespace Web {
+
 HTMLFontElement::HTMLFontElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -47,3 +49,5 @@ void HTMLFontElement::apply_presentational_hints(StyleProperties& style) const
         }
     });
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLFontElement.h b/Libraries/LibHTML/DOM/HTMLFontElement.h
index 74cfe8d1c7..96503115e7 100644
--- a/Libraries/LibHTML/DOM/HTMLFontElement.h
+++ b/Libraries/LibHTML/DOM/HTMLFontElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLFontElement : public HTMLElement {
 public:
     HTMLFontElement(Document&, const String& tag_name);
@@ -35,3 +37,5 @@ public:
 
     virtual void apply_presentational_hints(StyleProperties&) const override;
 };
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLFormElement.cpp b/Libraries/LibHTML/DOM/HTMLFormElement.cpp
index 20bcf4ec8a..a0f2df04e0 100644
--- a/Libraries/LibHTML/DOM/HTMLFormElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLFormElement.cpp
@@ -30,6 +30,8 @@
 #include <LibHTML/Frame.h>
 #include <LibHTML/HtmlView.h>
 
+namespace Web {
+
 HTMLFormElement::HTMLFormElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -80,3 +82,5 @@ void HTMLFormElement::submit()
     // FIXME: We shouldn't let the form just do this willy-nilly.
     document().frame()->html_view()->load(url);
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLFormElement.h b/Libraries/LibHTML/DOM/HTMLFormElement.h
index 00a3d41683..51cbf13bbd 100644
--- a/Libraries/LibHTML/DOM/HTMLFormElement.h
+++ b/Libraries/LibHTML/DOM/HTMLFormElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLFormElement : public HTMLElement {
 public:
     HTMLFormElement(Document&, const String& tag_name);
@@ -44,3 +46,5 @@ inline bool is<HTMLFormElement>(const Node& node)
 {
     return is<Element>(node) && to<Element>(node).tag_name().to_lowercase() == "form";
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLHRElement.cpp b/Libraries/LibHTML/DOM/HTMLHRElement.cpp
index 12d695896b..b4436e6966 100644
--- a/Libraries/LibHTML/DOM/HTMLHRElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLHRElement.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/DOM/HTMLHRElement.h>
 
+namespace Web {
+
 HTMLHRElement::HTMLHRElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -34,3 +36,5 @@ HTMLHRElement::HTMLHRElement(Document& document, const String& tag_name)
 HTMLHRElement::~HTMLHRElement()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLHRElement.h b/Libraries/LibHTML/DOM/HTMLHRElement.h
index bcf0b5a830..0b141d32a0 100644
--- a/Libraries/LibHTML/DOM/HTMLHRElement.h
+++ b/Libraries/LibHTML/DOM/HTMLHRElement.h
@@ -28,8 +28,12 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLHRElement : public HTMLElement {
 public:
     HTMLHRElement(Document&, const String& tag_name);
     virtual ~HTMLHRElement() override;
 };
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLHeadElement.cpp b/Libraries/LibHTML/DOM/HTMLHeadElement.cpp
index a6470ceace..7191d3b3c9 100644
--- a/Libraries/LibHTML/DOM/HTMLHeadElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLHeadElement.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/DOM/HTMLHeadElement.h>
 
+namespace Web {
+
 HTMLHeadElement::HTMLHeadElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -34,3 +36,5 @@ HTMLHeadElement::HTMLHeadElement(Document& document, const String& tag_name)
 HTMLHeadElement::~HTMLHeadElement()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLHeadElement.h b/Libraries/LibHTML/DOM/HTMLHeadElement.h
index aada9a4676..e769346987 100644
--- a/Libraries/LibHTML/DOM/HTMLHeadElement.h
+++ b/Libraries/LibHTML/DOM/HTMLHeadElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLHeadElement : public HTMLElement {
 public:
     HTMLHeadElement(Document&, const String& tag_name);
@@ -39,3 +41,5 @@ inline bool is<HTMLHeadElement>(const Node& node)
 {
     return is<Element>(node) && to<Element>(node).tag_name().to_lowercase() == "head";
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLHeadingElement.cpp b/Libraries/LibHTML/DOM/HTMLHeadingElement.cpp
index 7e498fec3c..aad30884f3 100644
--- a/Libraries/LibHTML/DOM/HTMLHeadingElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLHeadingElement.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/DOM/HTMLHeadingElement.h>
 
+namespace Web {
+
 HTMLHeadingElement::HTMLHeadingElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -34,3 +36,5 @@ HTMLHeadingElement::HTMLHeadingElement(Document& document, const String& tag_nam
 HTMLHeadingElement::~HTMLHeadingElement()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLHeadingElement.h b/Libraries/LibHTML/DOM/HTMLHeadingElement.h
index d38b3b4c57..54089ebc2e 100644
--- a/Libraries/LibHTML/DOM/HTMLHeadingElement.h
+++ b/Libraries/LibHTML/DOM/HTMLHeadingElement.h
@@ -28,8 +28,12 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLHeadingElement : public HTMLElement {
 public:
     HTMLHeadingElement(Document&, const String& tag_name);
     virtual ~HTMLHeadingElement() override;
 };
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLHtmlElement.cpp b/Libraries/LibHTML/DOM/HTMLHtmlElement.cpp
index 5ae74c148f..576a50c765 100644
--- a/Libraries/LibHTML/DOM/HTMLHtmlElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLHtmlElement.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/DOM/HTMLHtmlElement.h>
 
+namespace Web {
+
 HTMLHtmlElement::HTMLHtmlElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -34,3 +36,5 @@ HTMLHtmlElement::HTMLHtmlElement(Document& document, const String& tag_name)
 HTMLHtmlElement::~HTMLHtmlElement()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLHtmlElement.h b/Libraries/LibHTML/DOM/HTMLHtmlElement.h
index 168def22d7..673c80bc94 100644
--- a/Libraries/LibHTML/DOM/HTMLHtmlElement.h
+++ b/Libraries/LibHTML/DOM/HTMLHtmlElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLHtmlElement : public HTMLElement {
 public:
     HTMLHtmlElement(Document&, const String& tag_name);
@@ -39,3 +41,5 @@ inline bool is<HTMLHtmlElement>(const Node& node)
 {
     return is<Element>(node) && to<Element>(node).tag_name().to_lowercase() == "html";
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLImageElement.cpp b/Libraries/LibHTML/DOM/HTMLImageElement.cpp
index 0fcb61267f..316b6c0ce2 100644
--- a/Libraries/LibHTML/DOM/HTMLImageElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLImageElement.cpp
@@ -32,6 +32,8 @@
 #include <LibHTML/Layout/LayoutImage.h>
 #include <LibHTML/ResourceLoader.h>
 
+namespace Web {
+
 HTMLImageElement::HTMLImageElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -121,3 +123,5 @@ void HTMLImageElement::set_volatile(Badge<LayoutDocument>, bool v)
         return;
     m_image_decoder = Gfx::ImageDecoder::create(m_encoded_data.data(), m_encoded_data.size());
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLImageElement.h b/Libraries/LibHTML/DOM/HTMLImageElement.h
index d1c32b8efc..d4b412c12f 100644
--- a/Libraries/LibHTML/DOM/HTMLImageElement.h
+++ b/Libraries/LibHTML/DOM/HTMLImageElement.h
@@ -30,6 +30,8 @@
 #include <LibGfx/Forward.h>
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class LayoutDocument;
 
 class HTMLImageElement : public HTMLElement {
@@ -57,3 +59,5 @@ private:
     RefPtr<Gfx::ImageDecoder> m_image_decoder;
     ByteBuffer m_encoded_data;
 };
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLInputElement.cpp b/Libraries/LibHTML/DOM/HTMLInputElement.cpp
index 67753e3aea..0924c123c9 100644
--- a/Libraries/LibHTML/DOM/HTMLInputElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLInputElement.cpp
@@ -34,6 +34,8 @@
 #include <LibHTML/HtmlView.h>
 #include <LibHTML/Layout/LayoutWidget.h>
 
+namespace Web {
+
 HTMLInputElement::HTMLInputElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -76,3 +78,5 @@ RefPtr<LayoutNode> HTMLInputElement::create_layout_node(const StyleProperties*)
 
     return adopt(*new LayoutWidget(*this, *widget));
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLInputElement.h b/Libraries/LibHTML/DOM/HTMLInputElement.h
index 264a03b847..c4100d4526 100644
--- a/Libraries/LibHTML/DOM/HTMLInputElement.h
+++ b/Libraries/LibHTML/DOM/HTMLInputElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLInputElement : public HTMLElement {
 public:
     HTMLInputElement(Document&, const String& tag_name);
@@ -45,3 +47,5 @@ inline bool is<HTMLInputElement>(const Node& node)
 {
     return is<Element>(node) && to<Element>(node).tag_name().to_lowercase() == "input";
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLLinkElement.cpp b/Libraries/LibHTML/DOM/HTMLLinkElement.cpp
index bf9e79ff68..71083c88dd 100644
--- a/Libraries/LibHTML/DOM/HTMLLinkElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLLinkElement.cpp
@@ -32,6 +32,8 @@
 #include <LibHTML/Parser/CSSParser.h>
 #include <LibHTML/ResourceLoader.h>
 
+namespace Web {
+
 HTMLLinkElement::HTMLLinkElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -60,3 +62,5 @@ void HTMLLinkElement::inserted_into(Node&)
         });
     }
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLLinkElement.h b/Libraries/LibHTML/DOM/HTMLLinkElement.h
index 6a46f4b9ec..1e9176e148 100644
--- a/Libraries/LibHTML/DOM/HTMLLinkElement.h
+++ b/Libraries/LibHTML/DOM/HTMLLinkElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLLinkElement final : public HTMLElement {
 public:
     HTMLLinkElement(Document&, const String& tag_name);
@@ -45,3 +47,5 @@ inline bool is<HTMLLinkElement>(const Node& node)
 {
     return is<Element>(node) && to<Element>(node).tag_name().to_lowercase() == "link";
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLStyleElement.cpp b/Libraries/LibHTML/DOM/HTMLStyleElement.cpp
index 7a6bf17125..865d0b264a 100644
--- a/Libraries/LibHTML/DOM/HTMLStyleElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLStyleElement.cpp
@@ -30,6 +30,8 @@
 #include <LibHTML/DOM/Text.h>
 #include <LibHTML/Parser/CSSParser.h>
 
+namespace Web {
+
 HTMLStyleElement::HTMLStyleElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -59,3 +61,5 @@ void HTMLStyleElement::removed_from(Node& old_parent)
     }
     return HTMLElement::removed_from(old_parent);
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLStyleElement.h b/Libraries/LibHTML/DOM/HTMLStyleElement.h
index 89735e526e..deb54387c3 100644
--- a/Libraries/LibHTML/DOM/HTMLStyleElement.h
+++ b/Libraries/LibHTML/DOM/HTMLStyleElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class StyleSheet;
 
 class HTMLStyleElement : public HTMLElement {
@@ -41,3 +43,5 @@ public:
 private:
     RefPtr<StyleSheet> m_stylesheet;
 };
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLTitleElement.cpp b/Libraries/LibHTML/DOM/HTMLTitleElement.cpp
index 1ef15bf8c3..6aa5b699db 100644
--- a/Libraries/LibHTML/DOM/HTMLTitleElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLTitleElement.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/DOM/HTMLTitleElement.h>
 
+namespace Web {
+
 HTMLTitleElement::HTMLTitleElement(Document& document, const String& tag_name)
     : HTMLElement(document, tag_name)
 {
@@ -34,3 +36,5 @@ HTMLTitleElement::HTMLTitleElement(Document& document, const String& tag_name)
 HTMLTitleElement::~HTMLTitleElement()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/HTMLTitleElement.h b/Libraries/LibHTML/DOM/HTMLTitleElement.h
index 4343fbb2f2..c5731d5f46 100644
--- a/Libraries/LibHTML/DOM/HTMLTitleElement.h
+++ b/Libraries/LibHTML/DOM/HTMLTitleElement.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/HTMLElement.h>
 
+namespace Web {
+
 class HTMLTitleElement : public HTMLElement {
 public:
     HTMLTitleElement(Document&, const String& tag_name);
@@ -39,3 +41,5 @@ inline bool is<HTMLTitleElement>(const Node& node)
 {
     return is<Element>(node) && to<Element>(node).tag_name().to_lowercase() == "title";
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Node.cpp b/Libraries/LibHTML/DOM/Node.cpp
index 7e02a861f2..7f46574414 100644
--- a/Libraries/LibHTML/DOM/Node.cpp
+++ b/Libraries/LibHTML/DOM/Node.cpp
@@ -35,6 +35,8 @@
 #include <LibHTML/Layout/LayoutNode.h>
 #include <LibHTML/Layout/LayoutText.h>
 
+namespace Web {
+
 Node::Node(Document& document, NodeType type)
     : m_document(document)
     , m_type(type)
@@ -114,3 +116,5 @@ bool Node::is_link() const
         return false;
     return enclosing_link->has_attribute("href");
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Node.h b/Libraries/LibHTML/DOM/Node.h
index ebe23c028c..5d83911479 100644
--- a/Libraries/LibHTML/DOM/Node.h
+++ b/Libraries/LibHTML/DOM/Node.h
@@ -32,6 +32,8 @@
 #include <AK/Vector.h>
 #include <LibHTML/TreeNode.h>
 
+namespace Web {
+
 enum class NodeType : unsigned {
     INVALID = 0,
     ELEMENT_NODE = 1,
@@ -185,3 +187,5 @@ inline const T* Node::first_ancestor_of_type() const
     }
     return nullptr;
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/ParentNode.h b/Libraries/LibHTML/DOM/ParentNode.h
index 277db60daa..48c6bd5e2a 100644
--- a/Libraries/LibHTML/DOM/ParentNode.h
+++ b/Libraries/LibHTML/DOM/ParentNode.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/DOM/Node.h>
 
+namespace Web {
+
 class ParentNode : public Node {
 public:
     template<typename F> void for_each_child(F) const;
@@ -53,3 +55,5 @@ inline void ParentNode::for_each_child(Callback callback)
     for (auto* node = first_child(); node; node = node->next_sibling())
         callback(*node);
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Text.cpp b/Libraries/LibHTML/DOM/Text.cpp
index cd30c72609..c107b22bb9 100644
--- a/Libraries/LibHTML/DOM/Text.cpp
+++ b/Libraries/LibHTML/DOM/Text.cpp
@@ -27,6 +27,8 @@
 #include <LibHTML/DOM/Text.h>
 #include <LibHTML/Layout/LayoutText.h>
 
+namespace Web {
+
 Text::Text(Document& document, const String& data)
     : CharacterData(document, NodeType::TEXT_NODE, data)
 {
@@ -40,3 +42,5 @@ RefPtr<LayoutNode> Text::create_layout_node(const StyleProperties*) const
 {
     return adopt(*new LayoutText(*this));
 }
+
+}
diff --git a/Libraries/LibHTML/DOM/Text.h b/Libraries/LibHTML/DOM/Text.h
index d8bfd59141..e886b6d12f 100644
--- a/Libraries/LibHTML/DOM/Text.h
+++ b/Libraries/LibHTML/DOM/Text.h
@@ -29,6 +29,8 @@
 #include <AK/String.h>
 #include <LibHTML/DOM/CharacterData.h>
 
+namespace Web {
+
 class Text final : public CharacterData {
 public:
     explicit Text(Document&, const String&);
@@ -45,3 +47,5 @@ inline bool is<Text>(const Node& node)
 {
     return node.is_text();
 }
+
+}
diff --git a/Libraries/LibHTML/DOMTreeModel.cpp b/Libraries/LibHTML/DOMTreeModel.cpp
index bafb006e73..8535e3bd6f 100644
--- a/Libraries/LibHTML/DOMTreeModel.cpp
+++ b/Libraries/LibHTML/DOMTreeModel.cpp
@@ -32,6 +32,8 @@
 #include <ctype.h>
 #include <stdio.h>
 
+namespace Web {
+
 DOMTreeModel::DOMTreeModel(Document& document)
     : m_document(document)
 {
@@ -151,3 +153,5 @@ void DOMTreeModel::update()
 {
     did_update();
 }
+
+}
diff --git a/Libraries/LibHTML/DOMTreeModel.h b/Libraries/LibHTML/DOMTreeModel.h
index c25fce7e43..9e498ca4ed 100644
--- a/Libraries/LibHTML/DOMTreeModel.h
+++ b/Libraries/LibHTML/DOMTreeModel.h
@@ -28,6 +28,8 @@
 
 #include <LibGUI/Model.h>
 
+namespace Web {
+
 class Document;
 
 class DOMTreeModel final : public GUI::Model {
@@ -55,3 +57,5 @@ private:
     GUI::Icon m_element_icon;
     GUI::Icon m_text_icon;
 };
+
+}
diff --git a/Libraries/LibHTML/Dump.cpp b/Libraries/LibHTML/Dump.cpp
index fcdfe16360..b85105eb06 100644
--- a/Libraries/LibHTML/Dump.cpp
+++ b/Libraries/LibHTML/Dump.cpp
@@ -38,6 +38,8 @@
 #include <LibHTML/Layout/LayoutText.h>
 #include <stdio.h>
 
+namespace Web {
+
 void dump_tree(const Node& node)
 {
     static int indent = 0;
@@ -252,3 +254,5 @@ void dump_sheet(const StyleSheet& sheet)
         dump_rule(rule);
     }
 }
+
+}
diff --git a/Libraries/LibHTML/Dump.h b/Libraries/LibHTML/Dump.h
index fac96e7844..07b5a7e17c 100644
--- a/Libraries/LibHTML/Dump.h
+++ b/Libraries/LibHTML/Dump.h
@@ -26,6 +26,8 @@
 
 #pragma once
 
+namespace Web {
+
 class Node;
 class LayoutNode;
 class StyleRule;
@@ -37,3 +39,5 @@ void dump_sheet(const StyleSheet&);
 void dump_rule(const StyleRule&);
 
 #undef HTML_DEBUG
+
+}
diff --git a/Libraries/LibHTML/Forward.h b/Libraries/LibHTML/Forward.h
new file mode 100644
index 0000000000..d700b317c3
--- /dev/null
+++ b/Libraries/LibHTML/Forward.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+namespace Web {
+
+class Document;
+class Element;
+class Frame;
+class HtmlView;
+class Node;
+
+}
diff --git a/Libraries/LibHTML/Frame.cpp b/Libraries/LibHTML/Frame.cpp
index 235adf2207..5559ce769b 100644
--- a/Libraries/LibHTML/Frame.cpp
+++ b/Libraries/LibHTML/Frame.cpp
@@ -29,6 +29,8 @@
 #include <LibHTML/HtmlView.h>
 #include <LibHTML/Layout/LayoutDocument.h>
 
+namespace Web {
+
 Frame::Frame(HtmlView& html_view)
     : m_html_view(html_view.make_weak_ptr())
 {
@@ -78,3 +80,5 @@ void Frame::set_needs_display(const Gfx::Rect& rect)
         return;
     on_set_needs_display(rect);
 }
+
+}
diff --git a/Libraries/LibHTML/Frame.h b/Libraries/LibHTML/Frame.h
index 830653b45e..97a72b9d4f 100644
--- a/Libraries/LibHTML/Frame.h
+++ b/Libraries/LibHTML/Frame.h
@@ -34,6 +34,8 @@
 #include <LibGfx/Size.h>
 #include <LibHTML/TreeNode.h>
 
+namespace Web {
+
 class Document;
 class HtmlView;
 
@@ -67,3 +69,5 @@ private:
     Gfx::Size m_size;
     Gfx::Rect m_viewport_rect;
 };
+
+}
diff --git a/Libraries/LibHTML/HtmlView.cpp b/Libraries/LibHTML/HtmlView.cpp
index ea2178aab0..85c23c4700 100644
--- a/Libraries/LibHTML/HtmlView.cpp
+++ b/Libraries/LibHTML/HtmlView.cpp
@@ -25,6 +25,7 @@
  */
 
 #include <AK/FileSystemPath.h>
+#include <AK/URL.h>
 #include <LibCore/File.h>
 #include <LibGUI/Application.h>
 #include <LibGUI/Painter.h>
@@ -46,8 +47,10 @@
 #include <LibHTML/ResourceLoader.h>
 #include <stdio.h>
 
+namespace Web {
+
 HtmlView::HtmlView()
-    : m_main_frame(::Frame::create(*this))
+    : m_main_frame(Web::Frame::create(*this))
 {
     main_frame().on_set_needs_display = [this](auto& content_rect) {
         if (content_rect.is_empty()) {
@@ -320,7 +323,7 @@ static RefPtr<Document> create_image_document(const ByteBuffer& data, const URL&
 
 void HtmlView::load(const URL& url)
 {
-    dbg() << "HtmlView::load: " << url;
+    dbg() << "HtmlView::load: " << url.to_string();
 
     if (window())
         window()->set_override_cursor(GUI::StandardCursor::None);
@@ -410,3 +413,5 @@ void HtmlView::did_scroll()
 {
     main_frame().set_viewport_rect(visible_content_rect());
 }
+
+}
diff --git a/Libraries/LibHTML/HtmlView.h b/Libraries/LibHTML/HtmlView.h
index b38320afe0..f5efd9aaef 100644
--- a/Libraries/LibHTML/HtmlView.h
+++ b/Libraries/LibHTML/HtmlView.h
@@ -29,6 +29,8 @@
 #include <LibGUI/ScrollableWidget.h>
 #include <LibHTML/DOM/Document.h>
 
+namespace Web {
+
 class Frame;
 
 class HtmlView : public GUI::ScrollableWidget {
@@ -43,8 +45,8 @@ public:
     const LayoutDocument* layout_root() const;
     LayoutDocument* layout_root();
 
-    ::Frame& main_frame() { return *m_main_frame; }
-    const ::Frame& main_frame() const { return *m_main_frame; }
+    Web::Frame& main_frame() { return *m_main_frame; }
+    const Web::Frame& main_frame() const { return *m_main_frame; }
 
     void reload();
     void load(const URL&);
@@ -77,8 +79,10 @@ private:
     void layout_and_sync_size();
     void dump_selection(const char* event_name);
 
-    RefPtr<::Frame> m_main_frame;
+    RefPtr<Web::Frame> m_main_frame;
 
     bool m_should_show_line_box_borders { false };
     bool m_in_mouse_selection { false };
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/BoxModelMetrics.cpp b/Libraries/LibHTML/Layout/BoxModelMetrics.cpp
index 259a1c007e..e10576e9e4 100644
--- a/Libraries/LibHTML/Layout/BoxModelMetrics.cpp
+++ b/Libraries/LibHTML/Layout/BoxModelMetrics.cpp
@@ -26,6 +26,8 @@
 
 #include <LibHTML/Layout/BoxModelMetrics.h>
 
+namespace Web {
+
 BoxModelMetrics::BoxModelMetrics()
 {
 }
@@ -43,3 +45,5 @@ BoxModelMetrics::PixelBox BoxModelMetrics::full_margin() const
         m_margin.left.to_px() + m_border.left.to_px() + m_padding.left.to_px(),
     };
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/BoxModelMetrics.h b/Libraries/LibHTML/Layout/BoxModelMetrics.h
index 57f146f7d5..0e27edc07c 100644
--- a/Libraries/LibHTML/Layout/BoxModelMetrics.h
+++ b/Libraries/LibHTML/Layout/BoxModelMetrics.h
@@ -29,6 +29,8 @@
 #include <LibGfx/Size.h>
 #include <LibHTML/CSS/LengthBox.h>
 
+namespace Web {
+
 class BoxModelMetrics {
 public:
     BoxModelMetrics();
@@ -56,3 +58,5 @@ private:
     LengthBox m_padding;
     LengthBox m_border;
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutBlock.cpp b/Libraries/LibHTML/Layout/LayoutBlock.cpp
index 7fab79726b..360fa85924 100644
--- a/Libraries/LibHTML/Layout/LayoutBlock.cpp
+++ b/Libraries/LibHTML/Layout/LayoutBlock.cpp
@@ -33,6 +33,8 @@
 #include <LibHTML/Layout/LayoutText.h>
 #include <math.h>
 
+namespace Web {
+
 LayoutBlock::LayoutBlock(const Node* node, NonnullRefPtr<StyleProperties> style)
     : LayoutBox(node, move(style))
 {
@@ -384,3 +386,5 @@ LineBox& LayoutBlock::add_line_box()
     m_line_boxes.append(LineBox());
     return m_line_boxes.last();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutBlock.h b/Libraries/LibHTML/Layout/LayoutBlock.h
index 5f5d2d769d..b1f0d57c05 100644
--- a/Libraries/LibHTML/Layout/LayoutBlock.h
+++ b/Libraries/LibHTML/Layout/LayoutBlock.h
@@ -29,6 +29,8 @@
 #include <LibHTML/Layout/LayoutBox.h>
 #include <LibHTML/Layout/LineBox.h>
 
+namespace Web {
+
 class Element;
 
 class LayoutBlock : public LayoutBox {
@@ -103,3 +105,5 @@ inline bool is<LayoutBlock>(const LayoutNode& node)
 {
     return node.is_block();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutBox.cpp b/Libraries/LibHTML/Layout/LayoutBox.cpp
index 51a7bd0292..0bc90c8f41 100644
--- a/Libraries/LibHTML/Layout/LayoutBox.cpp
+++ b/Libraries/LibHTML/Layout/LayoutBox.cpp
@@ -34,6 +34,8 @@
 //#define DRAW_BOXES_AROUND_LAYOUT_NODES
 //#define DRAW_BOXES_AROUND_HOVERED_NODES
 
+namespace Web {
+
 void LayoutBox::paint_border(RenderingContext& context, Edge edge, const Gfx::FloatRect& rect, CSS::PropertyID style_property_id, CSS::PropertyID color_property_id, CSS::PropertyID width_property_id)
 {
     auto border_width = style().property(width_property_id);
@@ -238,3 +240,5 @@ bool LayoutBox::is_body() const
 {
     return node() && node() == document().body();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutBox.h b/Libraries/LibHTML/Layout/LayoutBox.h
index 5c9a226faf..d79b5a6e4e 100644
--- a/Libraries/LibHTML/Layout/LayoutBox.h
+++ b/Libraries/LibHTML/Layout/LayoutBox.h
@@ -29,6 +29,8 @@
 #include <LibGfx/FloatRect.h>
 #include <LibHTML/Layout/LayoutNode.h>
 
+namespace Web {
+
 class LayoutBox : public LayoutNodeWithStyleAndBoxModelMetrics {
 public:
     const Gfx::FloatRect& rect() const { return m_rect; }
@@ -74,3 +76,5 @@ inline bool is<LayoutBox>(const LayoutNode& node)
 {
     return node.is_box();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutBreak.cpp b/Libraries/LibHTML/Layout/LayoutBreak.cpp
index e91cb1bae5..d85e8c32e7 100644
--- a/Libraries/LibHTML/Layout/LayoutBreak.cpp
+++ b/Libraries/LibHTML/Layout/LayoutBreak.cpp
@@ -27,6 +27,8 @@
 #include <LibHTML/Layout/LayoutBlock.h>
 #include <LibHTML/Layout/LayoutBreak.h>
 
+namespace Web {
+
 LayoutBreak::LayoutBreak(const HTMLBRElement& element)
     : LayoutNodeWithStyleAndBoxModelMetrics(&element, StyleProperties::create())
 {
@@ -41,3 +43,5 @@ void LayoutBreak::split_into_lines(LayoutBlock& block)
 {
     block.add_line_box();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutBreak.h b/Libraries/LibHTML/Layout/LayoutBreak.h
index b5e8c29e90..ef3f0f2439 100644
--- a/Libraries/LibHTML/Layout/LayoutBreak.h
+++ b/Libraries/LibHTML/Layout/LayoutBreak.h
@@ -29,6 +29,8 @@
 #include <LibHTML/DOM/HTMLBRElement.h>
 #include <LibHTML/Layout/LayoutNode.h>
 
+namespace Web {
+
 class LayoutBreak final : public LayoutNodeWithStyleAndBoxModelMetrics {
 public:
     explicit LayoutBreak(const HTMLBRElement&);
@@ -40,3 +42,5 @@ private:
     virtual const char* class_name() const override { return "LayoutBreak"; }
     virtual void split_into_lines(LayoutBlock&) override;
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutDocument.cpp b/Libraries/LibHTML/Layout/LayoutDocument.cpp
index b1fc37800c..f711a31071 100644
--- a/Libraries/LibHTML/Layout/LayoutDocument.cpp
+++ b/Libraries/LibHTML/Layout/LayoutDocument.cpp
@@ -29,6 +29,8 @@
 #include <LibHTML/Layout/LayoutDocument.h>
 #include <LibHTML/Layout/LayoutImage.h>
 
+namespace Web {
+
 LayoutDocument::LayoutDocument(const Document& document, NonnullRefPtr<StyleProperties> style)
     : LayoutBlock(&document, move(style))
 {
@@ -65,3 +67,5 @@ void LayoutDocument::did_set_viewport_rect(Badge<Frame>, const Gfx::Rect& a_view
         return IterationDecision::Continue;
     });
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutDocument.h b/Libraries/LibHTML/Layout/LayoutDocument.h
index 7cd59b68b1..39f68c459a 100644
--- a/Libraries/LibHTML/Layout/LayoutDocument.h
+++ b/Libraries/LibHTML/Layout/LayoutDocument.h
@@ -29,6 +29,8 @@
 #include <LibHTML/DOM/Document.h>
 #include <LibHTML/Layout/LayoutBlock.h>
 
+namespace Web {
+
 class LayoutDocument final : public LayoutBlock {
 public:
     explicit LayoutDocument(const Document&, NonnullRefPtr<StyleProperties>);
@@ -46,3 +48,5 @@ public:
 private:
     LayoutRange m_selection;
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutImage.cpp b/Libraries/LibHTML/Layout/LayoutImage.cpp
index 22fccfebd5..45e865a931 100644
--- a/Libraries/LibHTML/Layout/LayoutImage.cpp
+++ b/Libraries/LibHTML/Layout/LayoutImage.cpp
@@ -29,6 +29,8 @@
 #include <LibGUI/Painter.h>
 #include <LibHTML/Layout/LayoutImage.h>
 
+namespace Web {
+
 LayoutImage::LayoutImage(const HTMLImageElement& element, NonnullRefPtr<StyleProperties> style)
     : LayoutReplaced(element, move(style))
 {
@@ -83,3 +85,5 @@ bool LayoutImage::renders_as_alt_text() const
 {
     return !node().image_decoder();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutImage.h b/Libraries/LibHTML/Layout/LayoutImage.h
index f927a57028..54246466d9 100644
--- a/Libraries/LibHTML/Layout/LayoutImage.h
+++ b/Libraries/LibHTML/Layout/LayoutImage.h
@@ -29,6 +29,8 @@
 #include <LibHTML/DOM/HTMLImageElement.h>
 #include <LibHTML/Layout/LayoutReplaced.h>
 
+namespace Web {
+
 class HTMLImageElement;
 
 class LayoutImage : public LayoutReplaced {
@@ -53,3 +55,5 @@ inline bool is<LayoutImage>(const LayoutNode& node)
 {
     return node.is_image();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutInline.cpp b/Libraries/LibHTML/Layout/LayoutInline.cpp
index 9d6a0d4df6..2ba96ff60e 100644
--- a/Libraries/LibHTML/Layout/LayoutInline.cpp
+++ b/Libraries/LibHTML/Layout/LayoutInline.cpp
@@ -28,6 +28,8 @@
 #include <LibHTML/Layout/LayoutBlock.h>
 #include <LibHTML/Layout/LayoutInline.h>
 
+namespace Web {
+
 LayoutInline::LayoutInline(const Element& element, NonnullRefPtr<StyleProperties> style)
     : LayoutNodeWithStyleAndBoxModelMetrics(&element, move(style))
 {
@@ -37,3 +39,5 @@ LayoutInline::LayoutInline(const Element& element, NonnullRefPtr<StyleProperties
 LayoutInline::~LayoutInline()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutInline.h b/Libraries/LibHTML/Layout/LayoutInline.h
index 242e82be65..cd962a41cb 100644
--- a/Libraries/LibHTML/Layout/LayoutInline.h
+++ b/Libraries/LibHTML/Layout/LayoutInline.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/Layout/LayoutBox.h>
 
+namespace Web {
+
 class LayoutBlock;
 
 class LayoutInline : public LayoutNodeWithStyleAndBoxModelMetrics {
@@ -36,3 +38,5 @@ public:
     virtual ~LayoutInline() override;
     virtual const char* class_name() const override { return "LayoutInline"; }
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutListItem.cpp b/Libraries/LibHTML/Layout/LayoutListItem.cpp
index b3fb90dcf3..322bf7b6e3 100644
--- a/Libraries/LibHTML/Layout/LayoutListItem.cpp
+++ b/Libraries/LibHTML/Layout/LayoutListItem.cpp
@@ -27,6 +27,8 @@
 #include <LibHTML/Layout/LayoutListItem.h>
 #include <LibHTML/Layout/LayoutListItemMarker.h>
 
+namespace Web {
+
 LayoutListItem::LayoutListItem(const Element& element, NonnullRefPtr<StyleProperties> style)
     : LayoutBlock(&element, move(style))
 {
@@ -50,3 +52,5 @@ void LayoutListItem::layout()
     Gfx::FloatRect marker_rect { x() - 8, y(), 4, height() };
     m_marker->set_rect(marker_rect);
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutListItem.h b/Libraries/LibHTML/Layout/LayoutListItem.h
index 16324bd919..0b4414b496 100644
--- a/Libraries/LibHTML/Layout/LayoutListItem.h
+++ b/Libraries/LibHTML/Layout/LayoutListItem.h
@@ -29,6 +29,8 @@
 #include <LibHTML/DOM/Element.h>
 #include <LibHTML/Layout/LayoutBlock.h>
 
+namespace Web {
+
 class LayoutListItemMarker;
 
 class LayoutListItem final : public LayoutBlock {
@@ -43,3 +45,5 @@ private:
 
     RefPtr<LayoutListItemMarker> m_marker;
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutListItemMarker.cpp b/Libraries/LibHTML/Layout/LayoutListItemMarker.cpp
index 835c68f005..d30f43bf6f 100644
--- a/Libraries/LibHTML/Layout/LayoutListItemMarker.cpp
+++ b/Libraries/LibHTML/Layout/LayoutListItemMarker.cpp
@@ -27,6 +27,8 @@
 #include <LibGUI/Painter.h>
 #include <LibHTML/Layout/LayoutListItemMarker.h>
 
+namespace Web {
+
 LayoutListItemMarker::LayoutListItemMarker()
     : LayoutBox(nullptr, StyleProperties::create())
 {
@@ -44,3 +46,5 @@ void LayoutListItemMarker::render(RenderingContext& context)
     auto color = parent()->style().color_or_fallback(CSS::PropertyID::Color, document(), context.palette().base_text());
     context.painter().fill_rect(bullet_rect, color);
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutListItemMarker.h b/Libraries/LibHTML/Layout/LayoutListItemMarker.h
index 2afc387a28..c36baaf1f4 100644
--- a/Libraries/LibHTML/Layout/LayoutListItemMarker.h
+++ b/Libraries/LibHTML/Layout/LayoutListItemMarker.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/Layout/LayoutBox.h>
 
+namespace Web {
+
 class LayoutListItemMarker final : public LayoutBox {
 public:
     LayoutListItemMarker();
@@ -38,3 +40,5 @@ public:
 private:
     virtual const char* class_name() const override { return "LayoutListItemMarker"; }
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutNode.cpp b/Libraries/LibHTML/Layout/LayoutNode.cpp
index d1ec2f7453..fd0c788642 100644
--- a/Libraries/LibHTML/Layout/LayoutNode.cpp
+++ b/Libraries/LibHTML/Layout/LayoutNode.cpp
@@ -31,6 +31,8 @@
 #include <LibHTML/Layout/LayoutBlock.h>
 #include <LibHTML/Layout/LayoutNode.h>
 
+namespace Web {
+
 LayoutNode::LayoutNode(const Node* node)
     : m_node(node)
 {
@@ -152,3 +154,5 @@ Gfx::FloatPoint LayoutNode::box_type_agnostic_position() const
     }
     return position;
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutNode.h b/Libraries/LibHTML/Layout/LayoutNode.h
index 6f218ae644..ebb74e6dea 100644
--- a/Libraries/LibHTML/Layout/LayoutNode.h
+++ b/Libraries/LibHTML/Layout/LayoutNode.h
@@ -36,6 +36,8 @@
 #include <LibHTML/RenderingContext.h>
 #include <LibHTML/TreeNode.h>
 
+namespace Web {
+
 class Document;
 class Element;
 class LayoutBlock;
@@ -315,3 +317,5 @@ inline T* LayoutNode::first_ancestor_of_type()
     }
     return nullptr;
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutPosition.h b/Libraries/LibHTML/Layout/LayoutPosition.h
index f8d7b2d4f1..227829fbad 100644
--- a/Libraries/LibHTML/Layout/LayoutPosition.h
+++ b/Libraries/LibHTML/Layout/LayoutPosition.h
@@ -28,6 +28,8 @@
 
 #include <AK/RefPtr.h>
 
+namespace Web {
+
 class LayoutNode;
 
 struct LayoutPosition {
@@ -80,3 +82,5 @@ private:
     LayoutPosition m_start;
     LayoutPosition m_end;
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutReplaced.cpp b/Libraries/LibHTML/Layout/LayoutReplaced.cpp
index efedb76d77..b60d2a2888 100644
--- a/Libraries/LibHTML/Layout/LayoutReplaced.cpp
+++ b/Libraries/LibHTML/Layout/LayoutReplaced.cpp
@@ -28,6 +28,8 @@
 #include <LibHTML/Layout/LayoutBlock.h>
 #include <LibHTML/Layout/LayoutReplaced.h>
 
+namespace Web {
+
 LayoutReplaced::LayoutReplaced(const Element& element, NonnullRefPtr<StyleProperties> style)
     : LayoutBox(&element, move(style))
 {
@@ -48,3 +50,5 @@ void LayoutReplaced::split_into_lines(LayoutBlock& container)
         line_box = &container.add_line_box();
     line_box->add_fragment(*this, 0, 0, width(), height());
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutReplaced.h b/Libraries/LibHTML/Layout/LayoutReplaced.h
index 1f0a93abd5..c48dfbaec1 100644
--- a/Libraries/LibHTML/Layout/LayoutReplaced.h
+++ b/Libraries/LibHTML/Layout/LayoutReplaced.h
@@ -27,6 +27,8 @@
 #include <LibHTML/DOM/Element.h>
 #include <LibHTML/Layout/LayoutBox.h>
 
+namespace Web {
+
 class LayoutReplaced : public LayoutBox {
 public:
     LayoutReplaced(const Element&, NonnullRefPtr<StyleProperties>);
@@ -47,3 +49,5 @@ inline bool is<LayoutReplaced>(const LayoutNode& node)
 {
     return node.is_replaced();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutTable.cpp b/Libraries/LibHTML/Layout/LayoutTable.cpp
index 226ebf4f68..17f00bb21f 100644
--- a/Libraries/LibHTML/Layout/LayoutTable.cpp
+++ b/Libraries/LibHTML/Layout/LayoutTable.cpp
@@ -28,6 +28,8 @@
 #include <LibHTML/Layout/LayoutTable.h>
 #include <LibHTML/Layout/LayoutTableRow.h>
 
+namespace Web {
+
 LayoutTable::LayoutTable(const Element& element, NonnullRefPtr<StyleProperties> style)
     : LayoutBlock(&element, move(style))
 {
@@ -52,3 +54,5 @@ const LayoutTableRow* LayoutTable::first_row() const
 {
     return first_child_of_type<LayoutTableRow>();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutTable.h b/Libraries/LibHTML/Layout/LayoutTable.h
index a880c761f4..738343449c 100644
--- a/Libraries/LibHTML/Layout/LayoutTable.h
+++ b/Libraries/LibHTML/Layout/LayoutTable.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/Layout/LayoutBlock.h>
 
+namespace Web {
+
 class LayoutTableRow;
 
 class LayoutTable final : public LayoutBlock {
@@ -50,3 +52,5 @@ inline bool is<LayoutTable>(const LayoutNode& node)
 {
     return node.is_table();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutTableCell.cpp b/Libraries/LibHTML/Layout/LayoutTableCell.cpp
index 48b00869a4..cf7f18078a 100644
--- a/Libraries/LibHTML/Layout/LayoutTableCell.cpp
+++ b/Libraries/LibHTML/Layout/LayoutTableCell.cpp
@@ -27,6 +27,8 @@
 #include <LibHTML/DOM/Element.h>
 #include <LibHTML/Layout/LayoutTableCell.h>
 
+namespace Web {
+
 LayoutTableCell::LayoutTableCell(const Element& element, NonnullRefPtr<StyleProperties> style)
     : LayoutBlock(&element, move(style))
 {
@@ -35,3 +37,5 @@ LayoutTableCell::LayoutTableCell(const Element& element, NonnullRefPtr<StyleProp
 LayoutTableCell::~LayoutTableCell()
 {
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutTableCell.h b/Libraries/LibHTML/Layout/LayoutTableCell.h
index 72e275451d..329d68874d 100644
--- a/Libraries/LibHTML/Layout/LayoutTableCell.h
+++ b/Libraries/LibHTML/Layout/LayoutTableCell.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/Layout/LayoutBlock.h>
 
+namespace Web {
+
 class LayoutTableCell final : public LayoutBlock {
 public:
     LayoutTableCell(const Element&, NonnullRefPtr<StyleProperties>);
@@ -46,3 +48,5 @@ inline bool is<LayoutTableCell>(const LayoutNode& node)
 {
     return node.is_table_cell();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutTableRow.cpp b/Libraries/LibHTML/Layout/LayoutTableRow.cpp
index 441602a0a1..effd6eebb6 100644
--- a/Libraries/LibHTML/Layout/LayoutTableRow.cpp
+++ b/Libraries/LibHTML/Layout/LayoutTableRow.cpp
@@ -28,6 +28,8 @@
 #include <LibHTML/Layout/LayoutTableCell.h>
 #include <LibHTML/Layout/LayoutTableRow.h>
 
+namespace Web {
+
 LayoutTableRow::LayoutTableRow(const Element& element, NonnullRefPtr<StyleProperties> style)
     : LayoutBox(&element, move(style))
 {
@@ -61,3 +63,5 @@ const LayoutTableRow* LayoutTableRow::next_row() const
 {
     return next_sibling_of_type<LayoutTableRow>();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutTableRow.h b/Libraries/LibHTML/Layout/LayoutTableRow.h
index 2fc39b5527..fc6c7ad93c 100644
--- a/Libraries/LibHTML/Layout/LayoutTableRow.h
+++ b/Libraries/LibHTML/Layout/LayoutTableRow.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/Layout/LayoutBox.h>
 
+namespace Web {
+
 class LayoutTableCell;
 
 class LayoutTableRow final : public LayoutBox {
@@ -53,3 +55,5 @@ inline bool is<LayoutTableRow>(const LayoutNode& node)
 {
     return node.is_table_row();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutText.cpp b/Libraries/LibHTML/Layout/LayoutText.cpp
index ac3ca91e28..6b2acd7373 100644
--- a/Libraries/LibHTML/Layout/LayoutText.cpp
+++ b/Libraries/LibHTML/Layout/LayoutText.cpp
@@ -34,6 +34,8 @@
 #include <LibHTML/Layout/LayoutText.h>
 #include <ctype.h>
 
+namespace Web {
+
 LayoutText::LayoutText(const Text& text)
     : LayoutNode(&text)
 {
@@ -231,3 +233,5 @@ void LayoutText::split_into_lines(LayoutBlock& container)
         }
     }
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutText.h b/Libraries/LibHTML/Layout/LayoutText.h
index ae2544d666..a8e4e47776 100644
--- a/Libraries/LibHTML/Layout/LayoutText.h
+++ b/Libraries/LibHTML/Layout/LayoutText.h
@@ -29,6 +29,8 @@
 #include <LibHTML/DOM/Text.h>
 #include <LibHTML/Layout/LayoutNode.h>
 
+namespace Web {
+
 class LineBoxFragment;
 
 class LayoutText : public LayoutNode {
@@ -64,3 +66,5 @@ inline bool is<LayoutText>(const LayoutNode& node)
 {
     return node.is_text();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutTreeBuilder.cpp b/Libraries/LibHTML/Layout/LayoutTreeBuilder.cpp
index 3992177040..436399f510 100644
--- a/Libraries/LibHTML/Layout/LayoutTreeBuilder.cpp
+++ b/Libraries/LibHTML/Layout/LayoutTreeBuilder.cpp
@@ -31,6 +31,8 @@
 #include <LibHTML/Layout/LayoutText.h>
 #include <LibHTML/Layout/LayoutTreeBuilder.h>
 
+namespace Web {
+
 LayoutTreeBuilder::LayoutTreeBuilder()
 {
 }
@@ -85,3 +87,5 @@ RefPtr<LayoutNode> LayoutTreeBuilder::build(Node& node)
     ASSERT(is<Document>(node));
     return create_layout_tree(node, nullptr);
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutTreeBuilder.h b/Libraries/LibHTML/Layout/LayoutTreeBuilder.h
index 7dba64a031..4e486b6218 100644
--- a/Libraries/LibHTML/Layout/LayoutTreeBuilder.h
+++ b/Libraries/LibHTML/Layout/LayoutTreeBuilder.h
@@ -28,6 +28,8 @@
 
 #include <AK/RefPtr.h>
 
+namespace Web {
+
 class Node;
 class LayoutNode;
 
@@ -37,3 +39,5 @@ public:
 
     RefPtr<LayoutNode> build(Node&);
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutWidget.cpp b/Libraries/LibHTML/Layout/LayoutWidget.cpp
index 9db153a4a0..f748fdfda7 100644
--- a/Libraries/LibHTML/Layout/LayoutWidget.cpp
+++ b/Libraries/LibHTML/Layout/LayoutWidget.cpp
@@ -30,6 +30,8 @@
 #include <LibGUI/Widget.h>
 #include <LibHTML/Layout/LayoutWidget.h>
 
+namespace Web {
+
 LayoutWidget::LayoutWidget(const Element& element, GUI::Widget& widget)
     : LayoutReplaced(element, StyleProperties::create())
     , m_widget(widget)
@@ -52,3 +54,5 @@ void LayoutWidget::render(RenderingContext& context)
 {
     LayoutReplaced::render(context);
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LayoutWidget.h b/Libraries/LibHTML/Layout/LayoutWidget.h
index 1cb7831655..7a8c9efe18 100644
--- a/Libraries/LibHTML/Layout/LayoutWidget.h
+++ b/Libraries/LibHTML/Layout/LayoutWidget.h
@@ -28,6 +28,8 @@
 
 #include <LibHTML/Layout/LayoutReplaced.h>
 
+namespace Web {
+
 class LayoutWidget : public LayoutReplaced {
 public:
     LayoutWidget(const Element&, GUI::Widget&);
@@ -52,3 +54,5 @@ inline bool is<LayoutWidget>(const LayoutNode& node)
 {
     return node.is_widget();
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LineBox.cpp b/Libraries/LibHTML/Layout/LineBox.cpp
index 88b3ab35e1..c71ced5b2e 100644
--- a/Libraries/LibHTML/Layout/LineBox.cpp
+++ b/Libraries/LibHTML/Layout/LineBox.cpp
@@ -30,6 +30,8 @@
 #include <LibHTML/Layout/LineBox.h>
 #include <ctype.h>
 
+namespace Web {
+
 void LineBox::add_fragment(const LayoutNode& layout_node, int start, int length, int width, int height)
 {
     bool text_align_is_justify = layout_node.style().string_or_fallback(CSS::PropertyID::TextAlign, "left") == "justify";
@@ -66,3 +68,5 @@ void LineBox::trim_trailing_whitespace()
         m_width -= space_width;
     }
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LineBox.h b/Libraries/LibHTML/Layout/LineBox.h
index 96033b3a22..b7ea2ac331 100644
--- a/Libraries/LibHTML/Layout/LineBox.h
+++ b/Libraries/LibHTML/Layout/LineBox.h
@@ -29,6 +29,8 @@
 #include <AK/Vector.h>
 #include <LibHTML/Layout/LineBoxFragment.h>
 
+namespace Web {
+
 class LineBox {
 public:
     LineBox() {}
@@ -46,3 +48,5 @@ private:
     Vector<LineBoxFragment> m_fragments;
     float m_width { 0 };
 };
+
+}
diff --git a/Libraries/LibHTML/Layout/LineBoxFragment.cpp b/Libraries/LibHTML/Layout/LineBoxFragment.cpp
index 4da598be71..1491e1db75 100644
--- a/Libraries/LibHTML/Layout/LineBoxFragment.cpp
+++ b/Libraries/LibHTML/Layout/LineBoxFragment.cpp
@@ -31,6 +31,8 @@
 #include <LibHTML/Layout/LineBoxFragment.h>
 #include <LibHTML/RenderingContext.h>
 
+namespace Web {
+
 void LineBoxFragment::render(RenderingContext& context)
 {
     for (auto* ancestor = layout_node().parent(); ancestor; ancestor = ancestor->parent()) {
@@ -75,3 +77,5 @@ int LineBoxFragment::text_index_at(float x) const
     }
     return m_start + m_length - 1;
 }
+
+}
diff --git a/Libraries/LibHTML/Layout/LineBoxFragment.h b/Libraries/LibHTML/Layout/LineBoxFragment.h
index b79cdffde0..c22cee77bd 100644
--- a/Libraries/LibHTML/Layout/LineBoxFragment.h
+++ b/Libraries/LibHTML/Layout/LineBoxFragment.h
@@ -28,6 +28,8 @@
 
 #include <LibGfx/FloatRect.h>
 
+namespace Web {
+
 class LayoutNode;
 class RenderingContext;
 
@@ -63,3 +65,5 @@ private:
     int m_length { 0 };
     Gfx::FloatRect m_rect;
 };
+
+}
diff --git a/Libraries/LibHTML/Parser/CSSParser.cpp b/Libraries/LibHTML/Parser/CSSParser.cpp
index b16da54860..d670cf3c1d 100644
--- a/Libraries/LibHTML/Parser/CSSParser.cpp
+++ b/Libraries/LibHTML/Parser/CSSParser.cpp
@@ -39,6 +39,8 @@
         ASSERT_NOT_REACHED();                                             \
     }
 
+namespace Web {
+
 static Optional<Color> parse_css_color(const StringView& view)
 {
     auto color = Color::from_string(view);
@@ -631,3 +633,5 @@ RefPtr<StyleDeclaration> parse_css_declaration(const StringView& css)
     CSSParser parser(css);
     return parser.parse_standalone_declaration();
 }
+
+}
diff --git a/Libraries/LibHTML/Parser/CSSParser.h b/Libraries/LibHTML/Parser/CSSParser.h
index 5918aaa5ec..260a9c372f 100644
--- a/Libraries/LibHTML/Parser/CSSParser.h
+++ b/Libraries/LibHTML/Parser/CSSParser.h
@@ -29,6 +29,10 @@
 #include <AK/NonnullRefPtr.h>
 #include <LibHTML/CSS/StyleSheet.h>
 
+namespace Web {
+
 RefPtr<StyleSheet> parse_css(const StringView&);
 RefPtr<StyleDeclaration> parse_css_declaration(const StringView&);
 NonnullRefPtr<StyleValue> parse_css_value(const StringView&);
+
+}
diff --git a/Libraries/LibHTML/Parser/HTMLParser.cpp b/Libraries/LibHTML/Parser/HTMLParser.cpp
index d105d87750..6f24a5277a 100644
--- a/Libraries/LibHTML/Parser/HTMLParser.cpp
+++ b/Libraries/LibHTML/Parser/HTMLParser.cpp
@@ -37,6 +37,8 @@
 #include <ctype.h>
 #include <stdio.h>
 
+namespace Web {
+
 static bool is_valid_in_attribute_name(char ch)
 {
     return isalnum(ch) || ch == '_' || ch == '-';
@@ -378,3 +380,5 @@ RefPtr<Document> parse_html_document(const StringView& html, const URL& url)
 
     return document;
 }
+
+}
diff --git a/Libraries/LibHTML/Parser/HTMLParser.h b/Libraries/LibHTML/Parser/HTMLParser.h
index 726cae246e..a3077f14cf 100644
--- a/Libraries/LibHTML/Parser/HTMLParser.h
+++ b/Libraries/LibHTML/Parser/HTMLParser.h
@@ -29,7 +29,11 @@
 #include <AK/NonnullRefPtr.h>
 #include <LibHTML/DOM/Document.h>
 
+namespace Web {
+
 class DocumentFragment;
 
 RefPtr<Document> parse_html_document(const StringView&, const URL& = URL());
 RefPtr<DocumentFragment> parse_html_fragment(Document&, const StringView&);
+
+}
diff --git a/Libraries/LibHTML/RenderingContext.h b/Libraries/LibHTML/RenderingContext.h
index 8880f205aa..36fc6c9d64 100644
--- a/Libraries/LibHTML/RenderingContext.h
+++ b/Libraries/LibHTML/RenderingContext.h
@@ -30,6 +30,8 @@
 #include <LibGfx/Rect.h>
 #include <LibGUI/Forward.h>
 
+namespace Web {
+
 class RenderingContext {
 public:
     explicit RenderingContext(GUI::Painter& painter, const Palette& palette)
@@ -53,3 +55,5 @@ private:
     Gfx::Rect m_viewport_rect;
     bool m_should_show_line_box_borders { false };
 };
+
+}
diff --git a/Libraries/LibHTML/ResourceLoader.cpp b/Libraries/LibHTML/ResourceLoader.cpp
index a4933a6a48..9e23aa6a32 100644
--- a/Libraries/LibHTML/ResourceLoader.cpp
+++ b/Libraries/LibHTML/ResourceLoader.cpp
@@ -30,6 +30,8 @@
 #include <LibProtocol/Client.h>
 #include <LibProtocol/Download.h>
 
+namespace Web {
+
 ResourceLoader& ResourceLoader::the()
 {
     static ResourceLoader* s_the;
@@ -83,3 +85,5 @@ void ResourceLoader::load(const URL& url, Function<void(const ByteBuffer&)> call
     dbg() << "Unimplemented protocol: " << url.protocol();
     ASSERT_NOT_REACHED();
 }
+
+}
diff --git a/Libraries/LibHTML/ResourceLoader.h b/Libraries/LibHTML/ResourceLoader.h
index eca57fa34e..fafd5156fd 100644
--- a/Libraries/LibHTML/ResourceLoader.h
+++ b/Libraries/LibHTML/ResourceLoader.h
@@ -34,6 +34,8 @@ namespace Protocol {
 class Client;
 }
 
+namespace Web {
+
 class ResourceLoader : public Core::Object {
     C_OBJECT(ResourceLoader)
 public:
@@ -53,3 +55,5 @@ private:
     Protocol::Client& protocol_client() { return *m_protocol_client; }
     RefPtr<Protocol::Client> m_protocol_client;
 };
+
+}
diff --git a/Libraries/LibHTML/Scripts/GenerateStyleSheetSource.sh b/Libraries/LibHTML/Scripts/GenerateStyleSheetSource.sh
index 68140bc5a5..c529206f4d 100755
--- a/Libraries/LibHTML/Scripts/GenerateStyleSheetSource.sh
+++ b/Libraries/LibHTML/Scripts/GenerateStyleSheetSource.sh
@@ -1,8 +1,10 @@
 #!/bin/sh
 
+echo "namespace Web {"
 echo "extern const char $1[];"
 echo "const char $1[] = \"\\"
 grep -v '^ *#' < "$2" | while IFS= read -r line; do
   echo "$line""\\"
 done
 echo "\";"
+echo "}"
diff --git a/Libraries/LibHTML/StylePropertiesModel.cpp b/Libraries/LibHTML/StylePropertiesModel.cpp
index f2b0b4f221..0bf7152be9 100644
--- a/Libraries/LibHTML/StylePropertiesModel.cpp
+++ b/Libraries/LibHTML/StylePropertiesModel.cpp
@@ -29,6 +29,8 @@
 #include <LibHTML/DOM/Document.h>
 #include <LibHTML/CSS/StyleProperties.h>
 
+namespace Web {
+
 StylePropertiesModel::StylePropertiesModel(const StyleProperties& properties)
     : m_properties(properties)
 {
@@ -72,3 +74,5 @@ void StylePropertiesModel::update()
 {
     did_update();
 }
+
+}
diff --git a/Libraries/LibHTML/StylePropertiesModel.h b/Libraries/LibHTML/StylePropertiesModel.h
index ed6a09810e..5b79c1ec01 100644
--- a/Libraries/LibHTML/StylePropertiesModel.h
+++ b/Libraries/LibHTML/StylePropertiesModel.h
@@ -27,6 +27,8 @@
 #include <AK/NonnullRefPtrVector.h>
 #include <LibGUI/Model.h>
 
+namespace Web {
+
 class StyleProperties;
 
 class StylePropertiesModel final : public GUI::Model {
@@ -57,3 +59,5 @@ private:
     };
     Vector<Value> m_values;
 };
+
+}
diff --git a/Libraries/LibHTML/TreeNode.h b/Libraries/LibHTML/TreeNode.h
index f0550b9b21..188d142ab3 100644
--- a/Libraries/LibHTML/TreeNode.h
+++ b/Libraries/LibHTML/TreeNode.h
@@ -30,6 +30,8 @@
 #include <AK/NonnullRefPtr.h>
 #include <AK/Weakable.h>
 
+namespace Web {
+
 // FIXME: I wish I didn't have to forward declare these, but I can't seem to avoid
 //        it if I still want to have for_each_in_subtree_of_type<U> inline here.
 class Node;
@@ -293,3 +295,5 @@ inline bool TreeNode<T>::is_ancestor_of(const TreeNode<T>& other) const
     }
     return false;
 }
+
+}
diff --git a/Userland/html.cpp b/Userland/html.cpp
index 76bbad5a43..71f1c7fc99 100644
--- a/Userland/html.cpp
+++ b/Userland/html.cpp
@@ -61,10 +61,10 @@ int main(int argc, char** argv)
     }
 
     String html = String::copy(f->read_all());
-    auto document = parse_html_document(html);
+    auto document = Web::parse_html_document(html);
 
     auto window = GUI::Window::construct();
-    auto& widget = window->set_main_widget<HtmlView>();
+    auto& widget = window->set_main_widget<Web::HtmlView>();
     widget.set_document(document);
     if (!widget.document()->title().is_null())
         window->set_title(String::format("%s - HTML", widget.document()->title().characters()));