diff --git a/Ladybird/AppKit/UI/LadybirdWebView.mm b/Ladybird/AppKit/UI/LadybirdWebView.mm
index 1b60ed200b..e4d775f181 100644
--- a/Ladybird/AppKit/UI/LadybirdWebView.mm
+++ b/Ladybird/AppKit/UI/LadybirdWebView.mm
@@ -636,7 +636,7 @@ static void copy_data_to_clipboard(StringView data, NSPasteboardType pasteboard_
         return [delegate cookieJar].get_named_cookie(url, name);
     };
 
-    m_web_view_bridge->on_get_cookie = [](auto const& url, auto source) -> ByteString {
+    m_web_view_bridge->on_get_cookie = [](auto const& url, auto source) {
         auto* delegate = (ApplicationDelegate*)[NSApp delegate];
         return [delegate cookieJar].get_cookie(url, source);
     };
diff --git a/Ladybird/Qt/BrowserWindow.cpp b/Ladybird/Qt/BrowserWindow.cpp
index 73fceae2ba..90bbf37cf7 100644
--- a/Ladybird/Qt/BrowserWindow.cpp
+++ b/Ladybird/Qt/BrowserWindow.cpp
@@ -541,7 +541,7 @@ Tab& BrowserWindow::create_new_tab(Web::HTML::ActivateTab activate_tab)
         return m_cookie_jar.get_named_cookie(url, name);
     };
 
-    tab->view().on_get_cookie = [this](auto& url, auto source) -> ByteString {
+    tab->view().on_get_cookie = [this](auto& url, auto source) {
         return m_cookie_jar.get_cookie(url, source);
     };
 
diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index 190eccfa29..7734cad659 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -2006,7 +2006,7 @@ void Document::completely_finish_loading()
 
 String Document::cookie(Cookie::Source source)
 {
-    return MUST(String::from_byte_string(page().client().page_did_request_cookie(m_url, source)));
+    return page().client().page_did_request_cookie(m_url, source);
 }
 
 void Document::set_cookie(StringView cookie_string, Cookie::Source source)
diff --git a/Userland/Libraries/LibWeb/Fetch/Fetching/Fetching.cpp b/Userland/Libraries/LibWeb/Fetch/Fetching/Fetching.cpp
index df90ea6608..f668f653bd 100644
--- a/Userland/Libraries/LibWeb/Fetch/Fetching/Fetching.cpp
+++ b/Userland/Libraries/LibWeb/Fetch/Fetching/Fetching.cpp
@@ -1431,7 +1431,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<PendingResponse>> http_network_or_cache_fet
                     // FIXME: Getting to the page client reliably is way too complicated, and going via the document won't work in workers.
                     auto document = Bindings::host_defined_environment_settings_object(realm).responsible_document();
                     if (!document)
-                        return ByteString::empty();
+                        return String {};
                     return document->page().client().page_did_request_cookie(http_request->current_url(), Cookie::Source::Http);
                 })();
 
diff --git a/Userland/Libraries/LibWeb/Loader/LoadRequest.cpp b/Userland/Libraries/LibWeb/Loader/LoadRequest.cpp
index 8ee1e19240..0ffbccc622 100644
--- a/Userland/Libraries/LibWeb/Loader/LoadRequest.cpp
+++ b/Userland/Libraries/LibWeb/Loader/LoadRequest.cpp
@@ -16,9 +16,9 @@ LoadRequest LoadRequest::create_for_url_on_page(const AK::URL& url, Page* page)
     request.set_url(url);
 
     if (page) {
-        ByteString cookie = page->client().page_did_request_cookie(url, Cookie::Source::Http);
+        auto cookie = page->client().page_did_request_cookie(url, Cookie::Source::Http);
         if (!cookie.is_empty())
-            request.set_header("Cookie", cookie);
+            request.set_header("Cookie", cookie.to_byte_string());
         request.set_page(*page);
     }
 
diff --git a/Userland/Libraries/LibWeb/Page/Page.h b/Userland/Libraries/LibWeb/Page/Page.h
index 32ab01a93c..8fcab42c31 100644
--- a/Userland/Libraries/LibWeb/Page/Page.h
+++ b/Userland/Libraries/LibWeb/Page/Page.h
@@ -264,7 +264,7 @@ public:
     virtual void page_did_request_dismiss_dialog() { }
     virtual Vector<Web::Cookie::Cookie> page_did_request_all_cookies(AK::URL const&) { return {}; }
     virtual Optional<Web::Cookie::Cookie> page_did_request_named_cookie(AK::URL const&, ByteString const&) { return {}; }
-    virtual ByteString page_did_request_cookie(const AK::URL&, Cookie::Source) { return {}; }
+    virtual String page_did_request_cookie(const AK::URL&, Cookie::Source) { return {}; }
     virtual void page_did_set_cookie(const AK::URL&, Cookie::ParsedCookie const&, Cookie::Source) { }
     virtual void page_did_update_cookie(Web::Cookie::Cookie) { }
     virtual void page_did_update_resource_count(i32) { }
diff --git a/Userland/Libraries/LibWebView/CookieJar.cpp b/Userland/Libraries/LibWebView/CookieJar.cpp
index 22cf2149eb..168970331b 100644
--- a/Userland/Libraries/LibWebView/CookieJar.cpp
+++ b/Userland/Libraries/LibWebView/CookieJar.cpp
@@ -80,7 +80,7 @@ CookieJar::CookieJar(TransientStorage storage)
 {
 }
 
-ByteString CookieJar::get_cookie(const URL& url, Web::Cookie::Source source)
+String CookieJar::get_cookie(const URL& url, Web::Cookie::Source source)
 {
     purge_expired_cookies();
 
@@ -100,7 +100,7 @@ ByteString CookieJar::get_cookie(const URL& url, Web::Cookie::Source source)
         builder.appendff("{}={}", cookie.name, cookie.value);
     }
 
-    return builder.to_byte_string();
+    return MUST(builder.to_string());
 }
 
 void CookieJar::set_cookie(const URL& url, Web::Cookie::ParsedCookie const& parsed_cookie, Web::Cookie::Source source)
diff --git a/Userland/Libraries/LibWebView/CookieJar.h b/Userland/Libraries/LibWebView/CookieJar.h
index 4b51c23f8e..8f7e576eba 100644
--- a/Userland/Libraries/LibWebView/CookieJar.h
+++ b/Userland/Libraries/LibWebView/CookieJar.h
@@ -49,7 +49,7 @@ public:
     static ErrorOr<CookieJar> create(Database&);
     static CookieJar create();
 
-    ByteString get_cookie(const URL& url, Web::Cookie::Source source);
+    String get_cookie(const URL& url, Web::Cookie::Source source);
     void set_cookie(const URL& url, Web::Cookie::ParsedCookie const& parsed_cookie, Web::Cookie::Source source);
     void update_cookie(Web::Cookie::Cookie);
     void dump_cookies();
diff --git a/Userland/Libraries/LibWebView/ViewImplementation.h b/Userland/Libraries/LibWebView/ViewImplementation.h
index c50e480e29..816158b309 100644
--- a/Userland/Libraries/LibWebView/ViewImplementation.h
+++ b/Userland/Libraries/LibWebView/ViewImplementation.h
@@ -153,7 +153,7 @@ public:
     Function<void(i32 start_index, Vector<ByteString> const& message_types, Vector<ByteString> const& messages)> on_received_console_messages;
     Function<Vector<Web::Cookie::Cookie>(AK::URL const& url)> on_get_all_cookies;
     Function<Optional<Web::Cookie::Cookie>(AK::URL const& url, ByteString const& name)> on_get_named_cookie;
-    Function<ByteString(const AK::URL& url, Web::Cookie::Source source)> on_get_cookie;
+    Function<String(const AK::URL& url, Web::Cookie::Source source)> on_get_cookie;
     Function<void(const AK::URL& url, Web::Cookie::ParsedCookie const& cookie, Web::Cookie::Source source)> on_set_cookie;
     Function<void(Web::Cookie::Cookie const& cookie)> on_update_cookie;
     Function<void(i32 count_waiting)> on_resource_status_change;
diff --git a/Userland/Libraries/LibWebView/WebContentClient.cpp b/Userland/Libraries/LibWebView/WebContentClient.cpp
index 6f033fa2fc..541ecbb92a 100644
--- a/Userland/Libraries/LibWebView/WebContentClient.cpp
+++ b/Userland/Libraries/LibWebView/WebContentClient.cpp
@@ -313,7 +313,7 @@ Messages::WebContentClient::DidRequestCookieResponse WebContentClient::did_reque
 {
     if (m_view.on_get_cookie)
         return m_view.on_get_cookie(url, static_cast<Web::Cookie::Source>(source));
-    return ByteString {};
+    return String {};
 }
 
 void WebContentClient::did_set_cookie(AK::URL const& url, Web::Cookie::ParsedCookie const& cookie, u8 source)
diff --git a/Userland/Services/WebContent/PageClient.cpp b/Userland/Services/WebContent/PageClient.cpp
index 66006f1825..c214a70e36 100644
--- a/Userland/Services/WebContent/PageClient.cpp
+++ b/Userland/Services/WebContent/PageClient.cpp
@@ -468,7 +468,7 @@ Optional<Web::Cookie::Cookie> PageClient::page_did_request_named_cookie(URL cons
     return client().did_request_named_cookie(url, name);
 }
 
-ByteString PageClient::page_did_request_cookie(const URL& url, Web::Cookie::Source source)
+String PageClient::page_did_request_cookie(const URL& url, Web::Cookie::Source source)
 {
     auto response = client().send_sync_but_allow_failure<Messages::WebContentClient::DidRequestCookie>(move(url), static_cast<u8>(source));
     if (!response) {
diff --git a/Userland/Services/WebContent/PageClient.h b/Userland/Services/WebContent/PageClient.h
index 2b6b167f92..af63e0d82f 100644
--- a/Userland/Services/WebContent/PageClient.h
+++ b/Userland/Services/WebContent/PageClient.h
@@ -114,7 +114,7 @@ private:
     virtual void page_did_change_favicon(Gfx::Bitmap const&) override;
     virtual Vector<Web::Cookie::Cookie> page_did_request_all_cookies(URL const&) override;
     virtual Optional<Web::Cookie::Cookie> page_did_request_named_cookie(URL const&, ByteString const&) override;
-    virtual ByteString page_did_request_cookie(const URL&, Web::Cookie::Source) override;
+    virtual String page_did_request_cookie(const URL&, Web::Cookie::Source) override;
     virtual void page_did_set_cookie(const URL&, Web::Cookie::ParsedCookie const&, Web::Cookie::Source) override;
     virtual void page_did_update_cookie(Web::Cookie::Cookie) override;
     virtual void page_did_update_resource_count(i32) override;
diff --git a/Userland/Services/WebContent/WebContentClient.ipc b/Userland/Services/WebContent/WebContentClient.ipc
index 1050f25e00..fd674832d0 100644
--- a/Userland/Services/WebContent/WebContentClient.ipc
+++ b/Userland/Services/WebContent/WebContentClient.ipc
@@ -54,7 +54,7 @@ endpoint WebContentClient
     did_change_favicon(Gfx::ShareableBitmap favicon) =|
     did_request_all_cookies(URL url) => (Vector<Web::Cookie::Cookie> cookies)
     did_request_named_cookie(URL url, ByteString name) => (Optional<Web::Cookie::Cookie> cookie)
-    did_request_cookie(URL url, u8 source) => (ByteString cookie)
+    did_request_cookie(URL url, u8 source) => (String cookie)
     did_set_cookie(URL url, Web::Cookie::ParsedCookie cookie, u8 source) => ()
     did_update_cookie(Web::Cookie::Cookie cookie) =|
     did_update_resource_count(i32 count_waiting) =|
diff --git a/Userland/Utilities/headless-browser.cpp b/Userland/Utilities/headless-browser.cpp
index 0cc3792d51..08c5280f02 100644
--- a/Userland/Utilities/headless-browser.cpp
+++ b/Userland/Utilities/headless-browser.cpp
@@ -168,7 +168,7 @@ private:
                 on_scroll_to_point(position);
         };
 
-        on_get_cookie = [this](auto const& url, auto source) -> ByteString {
+        on_get_cookie = [this](auto const& url, auto source) {
             return m_cookie_jar.get_cookie(url, source);
         };