diff --git a/Userland/Libraries/LibWeb/DOM/Attr.h b/Userland/Libraries/LibWeb/DOM/Attr.h
index 4a264b9b2f..04a970d8fa 100644
--- a/Userland/Libraries/LibWeb/DOM/Attr.h
+++ b/Userland/Libraries/LibWeb/DOM/Attr.h
@@ -24,7 +24,7 @@ public:
 
     virtual ~Attr() override = default;
 
-    virtual DeprecatedFlyString node_name() const override { return name(); }
+    virtual FlyString node_name() const override { return MUST(FlyString::from_deprecated_fly_string(name())); }
 
     DeprecatedFlyString const& namespace_uri() const { return m_qualified_name.namespace_(); }
     DeprecatedFlyString const& prefix() const { return m_qualified_name.prefix(); }
diff --git a/Userland/Libraries/LibWeb/DOM/CDATASection.h b/Userland/Libraries/LibWeb/DOM/CDATASection.h
index e15f308826..b2d831344a 100644
--- a/Userland/Libraries/LibWeb/DOM/CDATASection.h
+++ b/Userland/Libraries/LibWeb/DOM/CDATASection.h
@@ -18,7 +18,7 @@ public:
     virtual ~CDATASection() override;
 
     // ^Node
-    virtual DeprecatedFlyString node_name() const override { return "#cdata-section"; }
+    virtual FlyString node_name() const override { return "#cdata-section"_fly_string; }
 
 private:
     CDATASection(Document&, String const&);
diff --git a/Userland/Libraries/LibWeb/DOM/Comment.h b/Userland/Libraries/LibWeb/DOM/Comment.h
index f654d157f7..226a9ef789 100644
--- a/Userland/Libraries/LibWeb/DOM/Comment.h
+++ b/Userland/Libraries/LibWeb/DOM/Comment.h
@@ -18,7 +18,7 @@ public:
     static WebIDL::ExceptionOr<JS::NonnullGCPtr<Comment>> construct_impl(JS::Realm&, String const& data);
     virtual ~Comment() override = default;
 
-    virtual DeprecatedFlyString node_name() const override { return "#comment"; }
+    virtual FlyString node_name() const override { return "#comment"_fly_string; }
 
 private:
     Comment(Document&, String const&);
diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index 78e2f982d8..5717349f4a 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -706,7 +706,7 @@ DeprecatedString Document::title() const
     // 2. Otherwise, let value be the child text content of the title element, or the empty string if the title element
     //    is null.
     else if (auto title_element = this->title_element()) {
-        value = title_element->text_content();
+        value = title_element->text_content().value_or(String {}).to_deprecated_string();
     }
 
     // 3. Strip and collapse ASCII whitespace in value.
diff --git a/Userland/Libraries/LibWeb/DOM/Document.h b/Userland/Libraries/LibWeb/DOM/Document.h
index 3b162cc7ca..25eedd3082 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.h
+++ b/Userland/Libraries/LibWeb/DOM/Document.h
@@ -130,7 +130,7 @@ public:
 
     CSS::StyleSheetList* style_sheets_for_bindings() { return &style_sheets(); }
 
-    virtual DeprecatedFlyString node_name() const override { return "#document"; }
+    virtual FlyString node_name() const override { return "#document"_fly_string; }
 
     void set_hovered_node(Node*);
     Node* hovered_node() { return m_hovered_node.ptr(); }
diff --git a/Userland/Libraries/LibWeb/DOM/DocumentFragment.h b/Userland/Libraries/LibWeb/DOM/DocumentFragment.h
index f34aa27819..d4832fb0ef 100644
--- a/Userland/Libraries/LibWeb/DOM/DocumentFragment.h
+++ b/Userland/Libraries/LibWeb/DOM/DocumentFragment.h
@@ -23,7 +23,7 @@ public:
 
     virtual ~DocumentFragment() override = default;
 
-    virtual DeprecatedFlyString node_name() const override { return "#document-fragment"; }
+    virtual FlyString node_name() const override { return "#document-fragment"_fly_string; }
 
     Element* host() { return m_host.ptr(); }
     Element const* host() const { return m_host.ptr(); }
diff --git a/Userland/Libraries/LibWeb/DOM/DocumentType.h b/Userland/Libraries/LibWeb/DOM/DocumentType.h
index 236ddadcb6..ceda81d188 100644
--- a/Userland/Libraries/LibWeb/DOM/DocumentType.h
+++ b/Userland/Libraries/LibWeb/DOM/DocumentType.h
@@ -23,7 +23,7 @@ public:
 
     virtual ~DocumentType() override = default;
 
-    virtual DeprecatedFlyString node_name() const override { return "#doctype"; }
+    virtual FlyString node_name() const override { return "#doctype"_fly_string; }
 
     String const& name() const { return m_name; }
     void set_name(String const& name) { m_name = name; }
diff --git a/Userland/Libraries/LibWeb/DOM/Element.h b/Userland/Libraries/LibWeb/DOM/Element.h
index fabd955248..aedb1b9a82 100644
--- a/Userland/Libraries/LibWeb/DOM/Element.h
+++ b/Userland/Libraries/LibWeb/DOM/Element.h
@@ -76,7 +76,7 @@ public:
 
     DeprecatedFlyString const& qualified_name() const { return m_qualified_name.as_string(); }
     DeprecatedString const& html_uppercased_qualified_name() const { return m_html_uppercased_qualified_name; }
-    virtual DeprecatedFlyString node_name() const final { return html_uppercased_qualified_name(); }
+    virtual FlyString node_name() const final { return MUST(FlyString::from_deprecated_fly_string(html_uppercased_qualified_name())); }
     DeprecatedFlyString const& local_name() const { return m_qualified_name.local_name(); }
 
     // NOTE: This is for the JS bindings
diff --git a/Userland/Libraries/LibWeb/DOM/Node.cpp b/Userland/Libraries/LibWeb/DOM/Node.cpp
index 5ca21cd032..28a91030de 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Node.cpp
@@ -108,10 +108,10 @@ void Node::visit_edges(Cell::Visitor& visitor)
 }
 
 // https://dom.spec.whatwg.org/#dom-node-baseuri
-DeprecatedString Node::base_uri() const
+String Node::base_uri() const
 {
     // Return this’s node document’s document base URL, serialized.
-    return document().base_url().to_deprecated_string();
+    return MUST(document().base_url().to_string());
 }
 
 const HTML::HTMLAnchorElement* Node::enclosing_link_element() const
@@ -141,18 +141,18 @@ const HTML::HTMLElement* Node::enclosing_html_element_with_attribute(DeprecatedF
 }
 
 // https://dom.spec.whatwg.org/#concept-descendant-text-content
-DeprecatedString Node::descendant_text_content() const
+String Node::descendant_text_content() const
 {
     StringBuilder builder;
     for_each_in_subtree_of_type<Text>([&](auto& text_node) {
         builder.append(text_node.data());
         return IterationDecision::Continue;
     });
-    return builder.to_deprecated_string();
+    return MUST(builder.to_string());
 }
 
 // https://dom.spec.whatwg.org/#dom-node-textcontent
-DeprecatedString Node::text_content() const
+Optional<String> Node::text_content() const
 {
     // The textContent getter steps are to return the following, switching on the interface this implements:
 
@@ -162,21 +162,22 @@ DeprecatedString Node::text_content() const
 
     // If CharacterData, return this’s data.
     if (is<CharacterData>(this))
-        return static_cast<CharacterData const&>(*this).data();
+        return MUST(String::from_deprecated_string(static_cast<CharacterData const&>(*this).data()));
 
     // If Attr node, return this's value.
     if (is<Attr>(*this))
-        return static_cast<Attr const&>(*this).value();
+        return MUST(String::from_deprecated_string(static_cast<Attr const&>(*this).value()));
 
     // Otherwise, return null
     return {};
 }
 
 // https://dom.spec.whatwg.org/#ref-for-dom-node-textcontent%E2%91%A0
-void Node::set_text_content(DeprecatedString const& content)
+void Node::set_text_content(Optional<String> const& maybe_content)
 {
     // The textContent setter steps are to, if the given value is null, act as if it was the empty string instead,
     // and then do as described below, switching on the interface this implements:
+    auto content = maybe_content.value_or(String {}).to_deprecated_string();
 
     // If DocumentFragment or Element, string replace all with the given value within this.
     if (is<DocumentFragment>(this) || is<Element>(this)) {
@@ -205,18 +206,18 @@ void Node::set_text_content(DeprecatedString const& content)
 }
 
 // https://dom.spec.whatwg.org/#dom-node-nodevalue
-DeprecatedString Node::node_value() const
+Optional<String> Node::node_value() const
 {
     // The nodeValue getter steps are to return the following, switching on the interface this implements:
 
     // If Attr, return this’s value.
     if (is<Attr>(this)) {
-        return verify_cast<Attr>(this)->value();
+        return MUST(String::from_deprecated_string(verify_cast<Attr>(this)->value()));
     }
 
     // If CharacterData, return this’s data.
     if (is<CharacterData>(this)) {
-        return verify_cast<CharacterData>(this)->data();
+        return MUST(String::from_deprecated_string(verify_cast<CharacterData>(this)->data()));
     }
 
     // Otherwise, return null.
@@ -224,17 +225,18 @@ DeprecatedString Node::node_value() const
 }
 
 // https://dom.spec.whatwg.org/#ref-for-dom-node-nodevalue%E2%91%A0
-void Node::set_node_value(DeprecatedString const& value)
+void Node::set_node_value(Optional<String> const& maybe_value)
 {
     // The nodeValue setter steps are to, if the given value is null, act as if it was the empty string instead,
     // and then do as described below, switching on the interface this implements:
+    auto value = maybe_value.value_or(String {});
 
     // If Attr, set an existing attribute value with this and the given value.
     if (is<Attr>(this)) {
-        verify_cast<Attr>(this)->set_value(value);
+        verify_cast<Attr>(this)->set_value(value.to_deprecated_string());
     } else if (is<CharacterData>(this)) {
         // If CharacterData, replace data with node this, offset 0, count this’s length, and data the given value.
-        verify_cast<CharacterData>(this)->set_data(value);
+        verify_cast<CharacterData>(this)->set_data(value.to_deprecated_string());
     }
 
     // Otherwise, do nothing.
@@ -281,8 +283,11 @@ DeprecatedString Node::child_text_content() const
 
     StringBuilder builder;
     verify_cast<ParentNode>(*this).for_each_child([&](auto& child) {
-        if (is<Text>(child))
-            builder.append(verify_cast<Text>(child).text_content());
+        if (is<Text>(child)) {
+            auto maybe_content = verify_cast<Text>(child).text_content();
+            if (maybe_content.has_value())
+                builder.append(maybe_content.value());
+        }
     });
     return builder.to_deprecated_string();
 }
@@ -1149,7 +1154,7 @@ bool Node::is_uninteresting_whitespace_node() const
 
 void Node::serialize_tree_as_json(JsonObjectSerializer<StringBuilder>& object) const
 {
-    MUST(object.add("name"sv, node_name().view()));
+    MUST(object.add("name"sv, node_name()));
     MUST(object.add("id"sv, id()));
     if (is_document()) {
         MUST(object.add("type"sv, "document"));
@@ -1465,7 +1470,7 @@ JS::NonnullGCPtr<Node> Node::get_root_node(GetRootNodeOptions const& options)
 DeprecatedString Node::debug_description() const
 {
     StringBuilder builder;
-    builder.append(node_name().to_lowercase());
+    builder.append(node_name().to_deprecated_fly_string().to_lowercase());
     if (is_element()) {
         auto& element = static_cast<DOM::Element const&>(*this);
         if (auto id = element.get_attribute(HTML::AttributeNames::id); !id.is_null())
diff --git a/Userland/Libraries/LibWeb/DOM/Node.h b/Userland/Libraries/LibWeb/DOM/Node.h
index 45499ca9b2..62aadf7834 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.h
+++ b/Userland/Libraries/LibWeb/DOM/Node.h
@@ -136,16 +136,16 @@ public:
     JS::NonnullGCPtr<NodeList> child_nodes();
     Vector<JS::Handle<Node>> children_as_vector() const;
 
-    virtual DeprecatedFlyString node_name() const = 0;
+    virtual FlyString node_name() const = 0;
 
-    DeprecatedString base_uri() const;
+    String base_uri() const;
 
-    DeprecatedString descendant_text_content() const;
-    DeprecatedString text_content() const;
-    void set_text_content(DeprecatedString const&);
+    String descendant_text_content() const;
+    Optional<String> text_content() const;
+    void set_text_content(Optional<String> const&);
 
-    DeprecatedString node_value() const;
-    void set_node_value(DeprecatedString const&);
+    Optional<String> node_value() const;
+    void set_node_value(Optional<String> const&);
 
     JS::GCPtr<HTML::Navigable> navigable() const;
 
diff --git a/Userland/Libraries/LibWeb/DOM/Node.idl b/Userland/Libraries/LibWeb/DOM/Node.idl
index 688c7fd7fd..b2f290f6c1 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.idl
+++ b/Userland/Libraries/LibWeb/DOM/Node.idl
@@ -3,7 +3,7 @@
 #import <DOM/EventTarget.idl>
 
 // https://dom.spec.whatwg.org/#node
-[Exposed=Window, UseDeprecatedAKString]
+[Exposed=Window]
 interface Node : EventTarget {
 
     readonly attribute unsigned short nodeType;
diff --git a/Userland/Libraries/LibWeb/DOM/ProcessingInstruction.h b/Userland/Libraries/LibWeb/DOM/ProcessingInstruction.h
index ad5e448468..a4cfd12eec 100644
--- a/Userland/Libraries/LibWeb/DOM/ProcessingInstruction.h
+++ b/Userland/Libraries/LibWeb/DOM/ProcessingInstruction.h
@@ -17,7 +17,7 @@ class ProcessingInstruction final : public CharacterData {
 public:
     virtual ~ProcessingInstruction() override = default;
 
-    virtual DeprecatedFlyString node_name() const override { return m_target; }
+    virtual FlyString node_name() const override { return MUST(FlyString::from_deprecated_fly_string(m_target)); }
 
     DeprecatedString const& target() const { return m_target; }
 
diff --git a/Userland/Libraries/LibWeb/DOM/ShadowRoot.h b/Userland/Libraries/LibWeb/DOM/ShadowRoot.h
index 036fc50d1d..3eedffbd51 100644
--- a/Userland/Libraries/LibWeb/DOM/ShadowRoot.h
+++ b/Userland/Libraries/LibWeb/DOM/ShadowRoot.h
@@ -37,7 +37,7 @@ private:
     virtual void initialize(JS::Realm&) override;
 
     // ^Node
-    virtual DeprecatedFlyString node_name() const override { return "#shadow-root"; }
+    virtual FlyString node_name() const override { return "#shadow-root"_fly_string; }
     virtual bool is_shadow_root() const final { return true; }
 
     // NOTE: The specification doesn't seem to specify a default value for mode. Assuming closed for now.
diff --git a/Userland/Libraries/LibWeb/DOM/StyleElementUtils.cpp b/Userland/Libraries/LibWeb/DOM/StyleElementUtils.cpp
index 0f3fbb3084..f9842dfcfd 100644
--- a/Userland/Libraries/LibWeb/DOM/StyleElementUtils.cpp
+++ b/Userland/Libraries/LibWeb/DOM/StyleElementUtils.cpp
@@ -51,7 +51,7 @@ void StyleElementUtils::update_a_style_block(DOM::Element& style_element)
 
     // FIXME: This is a bit awkward, as the spec doesn't actually tell us when to parse the CSS text,
     //        so we just do it here and pass the parsed sheet to create_a_css_style_sheet().
-    auto* sheet = parse_css_stylesheet(CSS::Parser::ParsingContext(style_element.document()), style_element.text_content());
+    auto* sheet = parse_css_stylesheet(CSS::Parser::ParsingContext(style_element.document()), style_element.text_content().value_or(String {}));
     if (!sheet)
         return;
 
diff --git a/Userland/Libraries/LibWeb/DOM/Text.h b/Userland/Libraries/LibWeb/DOM/Text.h
index 6e401ff065..90e35dd1c5 100644
--- a/Userland/Libraries/LibWeb/DOM/Text.h
+++ b/Userland/Libraries/LibWeb/DOM/Text.h
@@ -31,7 +31,7 @@ public:
     static WebIDL::ExceptionOr<JS::NonnullGCPtr<Text>> construct_impl(JS::Realm& realm, String const& data);
 
     // ^Node
-    virtual DeprecatedFlyString node_name() const override { return "#text"; }
+    virtual FlyString node_name() const override { return "#text"_fly_string; }
     virtual bool is_editable() const override { return m_always_editable || CharacterData::is_editable(); }
 
     void set_always_editable(bool b) { m_always_editable = b; }
diff --git a/Userland/Libraries/LibWeb/Dump.cpp b/Userland/Libraries/LibWeb/Dump.cpp
index 2dcefeb9ab..28b20a57bb 100644
--- a/Userland/Libraries/LibWeb/Dump.cpp
+++ b/Userland/Libraries/LibWeb/Dump.cpp
@@ -144,7 +144,7 @@ void dump_tree(StringBuilder& builder, Layout::Node const& layout_node, bool sho
     else if (is<DOM::Element>(layout_node.dom_node()))
         tag_name = verify_cast<DOM::Element>(*layout_node.dom_node()).local_name();
     else
-        tag_name = layout_node.dom_node()->node_name();
+        tag_name = layout_node.dom_node()->node_name().to_deprecated_fly_string();
 
     DeprecatedString identifier = "";
     if (layout_node.dom_node() && is<DOM::Element>(*layout_node.dom_node())) {
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp
index a8b14681ab..f4bb1479b3 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp
@@ -108,7 +108,7 @@ Optional<ARIA::Role> HTMLAnchorElement::default_role() const
 String HTMLAnchorElement::text() const
 {
     // The text attribute's getter must return this element's descendant text content.
-    return MUST(String::from_deprecated_string(descendant_text_content()));
+    return descendant_text_content();
 }
 
 // https://html.spec.whatwg.org/multipage/text-level-semantics.html#dom-a-text
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
index e0b8ae366a..72390694a6 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
@@ -137,7 +137,7 @@ String HTMLElement::inner_text()
     // innerText for element being rendered takes visibility into account, so force a layout and then walk the layout tree.
     document().update_layout();
     if (!layout_node())
-        return MUST(String::from_deprecated_string(text_content()));
+        return text_content().value_or(String {});
 
     Function<void(Layout::Node const&)> recurse = [&](auto& node) {
         for (auto* child = node.first_child(); child; child = child->next_sibling()) {
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
index 8e813be978..7bfd1ddb49 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
@@ -106,7 +106,7 @@ void HTMLTextAreaElement::create_shadow_tree_if_needed()
     m_text_node->set_editable_text_node_owner(Badge<HTMLTextAreaElement> {}, *this);
     // NOTE: If `children_changed()` was called before now, `m_raw_value` will hold the text content.
     //       Otherwise, it will get filled in whenever that does get called.
-    m_text_node->set_text_content(m_raw_value);
+    m_text_node->set_text_content(MUST(String::from_deprecated_string(m_raw_value)));
 
     MUST(m_inner_text_element->append_child(*m_text_node));
     MUST(element->append_child(*m_inner_text_element));
@@ -122,7 +122,7 @@ void HTMLTextAreaElement::children_changed()
     if (!m_dirty) {
         m_raw_value = child_text_content();
         if (m_text_node)
-            m_text_node->set_text_content(m_raw_value);
+            m_text_node->set_text_content(MUST(String::from_deprecated_string(m_raw_value)));
     }
 }
 
diff --git a/Userland/Libraries/LibWeb/XML/XMLDocumentBuilder.cpp b/Userland/Libraries/LibWeb/XML/XMLDocumentBuilder.cpp
index 76a5fd4c9d..4dff5726ab 100644
--- a/Userland/Libraries/LibWeb/XML/XMLDocumentBuilder.cpp
+++ b/Userland/Libraries/LibWeb/XML/XMLDocumentBuilder.cpp
@@ -81,7 +81,7 @@ void XMLDocumentBuilder::element_start(const XML::Name& name, HashMap<XML::Name,
         script_element.set_parser_document(Badge<XMLDocumentBuilder> {}, m_document);
         script_element.set_force_async(Badge<XMLDocumentBuilder> {}, false);
     }
-    if (HTML::TagNames::template_ == m_current_node->node_name()) {
+    if (HTML::TagNames::template_ == m_current_node->node_name().to_deprecated_fly_string()) {
         // When an XML parser would append a node to a template element, it must instead append it to the template element's template contents (a DocumentFragment node).
         MUST(static_cast<HTML::HTMLTemplateElement&>(*m_current_node).content()->append_child(node));
     } else {
diff --git a/Userland/Services/WebContent/WebDriverConnection.cpp b/Userland/Services/WebContent/WebDriverConnection.cpp
index 3595ad9291..6bb62fef3a 100644
--- a/Userland/Services/WebContent/WebDriverConnection.cpp
+++ b/Userland/Services/WebContent/WebDriverConnection.cpp
@@ -1164,7 +1164,7 @@ Messages::WebDriverClient::GetElementTextResponse WebDriverConnection::get_eleme
     auto rendered_text = element->text_content();
 
     // 5. Return success with data rendered text.
-    return rendered_text;
+    return rendered_text.value_or(String {}).to_deprecated_string();
 }
 
 // 12.4.6 Get Element Tag Name, https://w3c.github.io/webdriver/#dfn-get-element-tag-name