diff --git a/Libraries/LibWeb/HTML/EventSource.cpp b/Libraries/LibWeb/HTML/EventSource.cpp
index 29aad139be0..6bca0823226 100644
--- a/Libraries/LibWeb/HTML/EventSource.cpp
+++ b/Libraries/LibWeb/HTML/EventSource.cpp
@@ -46,11 +46,11 @@ WebIDL::ExceptionOr<GC::Ref<EventSource>> EventSource::construct_impl(JS::Realm&
     auto url_record = settings.encoding_parse_url(url);
 
     // 4. If urlRecord is failure, then throw a "SyntaxError" DOMException.
-    if (!url_record.is_valid())
+    if (!url_record.has_value())
         return WebIDL::SyntaxError::create(realm, MUST(String::formatted("Invalid URL '{}'", url)));
 
     // 5. Set ev's url to urlRecord.
-    event_source->m_url = move(url_record);
+    event_source->m_url = url_record.release_value();
 
     // 6. Let corsAttributeState be Anonymous.
     auto cors_attribute_state = CORSSettingAttribute::Anonymous;
diff --git a/Libraries/LibWeb/HTML/History.cpp b/Libraries/LibWeb/HTML/History.cpp
index 5c9a5cfd360..98d632a6a5f 100644
--- a/Libraries/LibWeb/HTML/History.cpp
+++ b/Libraries/LibWeb/HTML/History.cpp
@@ -199,11 +199,11 @@ WebIDL::ExceptionOr<void> History::shared_history_push_replace_state(JS::Value d
         auto parsed_url = relevant_settings_object(*this).parse_url(url->to_byte_string());
 
         // 2. If that fails, then throw a "SecurityError" DOMException.
-        if (!parsed_url.is_valid())
+        if (!parsed_url.has_value())
             return WebIDL::SecurityError::create(realm(), "Cannot pushState or replaceState to incompatible URL"_string);
 
         // 3. Set newURL to the resulting URL record.
-        new_url = parsed_url;
+        new_url = parsed_url.release_value();
 
         // 4. If document cannot have its URL rewritten to newURL, then throw a "SecurityError" DOMException.
         if (!can_have_its_url_rewritten(document, new_url))
diff --git a/Libraries/LibWeb/HTML/Location.cpp b/Libraries/LibWeb/HTML/Location.cpp
index ab623084d37..af4d69c65b3 100644
--- a/Libraries/LibWeb/HTML/Location.cpp
+++ b/Libraries/LibWeb/HTML/Location.cpp
@@ -141,11 +141,11 @@ WebIDL::ExceptionOr<void> Location::set_href(String const& new_href)
     auto url = entry_settings_object().encoding_parse_url(new_href.to_byte_string());
 
     // 3. If url is failure, then throw a "SyntaxError" DOMException.
-    if (!url.is_valid())
+    if (!url.has_value())
         return WebIDL::SyntaxError::create(realm, MUST(String::formatted("Invalid URL '{}'", new_href)));
 
     // 4. Location-object navigate this to url.
-    TRY(navigate(url));
+    TRY(navigate(url.release_value()));
 
     return {};
 }
@@ -450,11 +450,11 @@ WebIDL::ExceptionOr<void> Location::replace(String const& url)
 
     // 2. Parse url relative to the entry settings object. If that failed, throw a "SyntaxError" DOMException.
     auto replace_url = entry_settings_object().parse_url(url);
-    if (!replace_url.is_valid())
+    if (!replace_url.has_value())
         return WebIDL::SyntaxError::create(realm(), MUST(String::formatted("Invalid URL '{}'", url)));
 
     // 3. Location-object navigate this to the resulting URL record given "replace".
-    TRY(navigate(replace_url, Bindings::NavigationHistoryBehavior::Replace));
+    TRY(navigate(replace_url.release_value(), Bindings::NavigationHistoryBehavior::Replace));
 
     return {};
 }
@@ -473,11 +473,11 @@ WebIDL::ExceptionOr<void> Location::assign(String const& url)
 
     // 3. Parse url relative to the entry settings object. If that failed, throw a "SyntaxError" DOMException.
     auto assign_url = entry_settings_object().parse_url(url);
-    if (!assign_url.is_valid())
+    if (!assign_url.has_value())
         return WebIDL::SyntaxError::create(realm(), MUST(String::formatted("Invalid URL '{}'", url)));
 
     // 4. Location-object navigate this to the resulting URL record.
-    TRY(navigate(assign_url));
+    TRY(navigate(assign_url.release_value()));
 
     return {};
 }
diff --git a/Libraries/LibWeb/HTML/Navigation.cpp b/Libraries/LibWeb/HTML/Navigation.cpp
index a391f1c6967..255aab7e3bc 100644
--- a/Libraries/LibWeb/HTML/Navigation.cpp
+++ b/Libraries/LibWeb/HTML/Navigation.cpp
@@ -229,7 +229,7 @@ WebIDL::ExceptionOr<NavigationResult> Navigation::navigate(String url, Navigatio
     //    If that returns failure, then return an early error result for a "SyntaxError" DOMException.
     //    Otherwise, let urlRecord be the resulting URL record.
     auto url_record = relevant_settings_object(*this).parse_url(url);
-    if (!url_record.is_valid())
+    if (!url_record.has_value())
         return early_error_result(WebIDL::SyntaxError::create(realm, "Cannot navigate to Invalid URL"_string));
 
     // 2. Let document be this's relevant global object's associated Document.
@@ -237,7 +237,7 @@ WebIDL::ExceptionOr<NavigationResult> Navigation::navigate(String url, Navigatio
 
     // 3. If options["history"] is "push", and the navigation must be a replace given urlRecord and document,
     //    then return an early error result for a "NotSupportedError" DOMException.
-    if (options.history == Bindings::NavigationHistoryBehavior::Push && navigation_must_be_a_replace(url_record, document))
+    if (options.history == Bindings::NavigationHistoryBehavior::Push && navigation_must_be_a_replace(url_record.value(), document))
         return early_error_result(WebIDL::NotSupportedError::create(realm, "Navigation must be a replace, but push was requested"_string));
 
     // 4. Let state be options["state"], if it exists; otherwise, undefined.
@@ -278,7 +278,7 @@ WebIDL::ExceptionOr<NavigationResult> Navigation::navigate(String url, Navigatio
     //       of the navigation, and we don't need to deal with the allowed by sandboxing to navigate check and its
     //       acccompanying exceptionsEnabled flag. We just treat all navigations as if they come from the Document
     //       corresponding to this Navigation object itself (i.e., document).
-    TRY(document.navigable()->navigate({ .url = url_record, .source_document = document, .history_handling = options.history, .navigation_api_state = move(serialized_state) }));
+    TRY(document.navigable()->navigate({ .url = url_record.release_value(), .source_document = document, .history_handling = options.history, .navigation_api_state = move(serialized_state) }));
 
     // 11. If this's upcoming non-traverse API method tracker is apiMethodTracker, then:
     // NOTE: If the upcoming non-traverse API method tracker is still apiMethodTracker, this means that the navigate
diff --git a/Libraries/LibWeb/HTML/Scripting/Environments.cpp b/Libraries/LibWeb/HTML/Scripting/Environments.cpp
index c077ece2e3a..fc7d3c4f0ce 100644
--- a/Libraries/LibWeb/HTML/Scripting/Environments.cpp
+++ b/Libraries/LibWeb/HTML/Scripting/Environments.cpp
@@ -203,17 +203,17 @@ void prepare_to_run_callback(JS::Realm& realm)
 }
 
 // https://html.spec.whatwg.org/multipage/urls-and-fetching.html#parse-a-url
-URL::URL EnvironmentSettingsObject::parse_url(StringView url)
+Optional<URL::URL> EnvironmentSettingsObject::parse_url(StringView url)
 {
     // 1. Let baseURL be environment's base URL, if environment is a Document object; otherwise environment's API base URL.
     auto base_url = api_base_url();
 
     // 2. Return the result of applying the URL parser to url, with baseURL.
-    return DOMURL::parse(url, base_url).value_or(URL::URL {});
+    return DOMURL::parse(url, base_url);
 }
 
 // https://html.spec.whatwg.org/multipage/urls-and-fetching.html#encoding-parsing-a-url
-URL::URL EnvironmentSettingsObject::encoding_parse_url(StringView url)
+Optional<URL::URL> EnvironmentSettingsObject::encoding_parse_url(StringView url)
 {
     // 1. Let encoding be UTF-8.
     auto encoding = "UTF-8"_string;
@@ -229,7 +229,7 @@ URL::URL EnvironmentSettingsObject::encoding_parse_url(StringView url)
     auto base_url = api_base_url();
 
     // 5. Return the result of applying the URL parser to url, with baseURL and encoding.
-    return DOMURL::parse(url, base_url, encoding).value_or(URL::URL {});
+    return DOMURL::parse(url, base_url, encoding);
 }
 
 // https://html.spec.whatwg.org/multipage/urls-and-fetching.html#encoding-parsing-and-serializing-a-url
@@ -239,11 +239,11 @@ Optional<String> EnvironmentSettingsObject::encoding_parse_and_serialize_url(Str
     auto parsed_url = encoding_parse_url(url);
 
     // 2. If url is failure, then return failure.
-    if (!parsed_url.is_valid())
+    if (!parsed_url.has_value())
         return {};
 
     // 3. Return the result of applying the URL serializer to url.
-    return parsed_url.serialize();
+    return parsed_url->serialize();
 }
 
 // https://html.spec.whatwg.org/multipage/webappapis.html#clean-up-after-running-a-callback
diff --git a/Libraries/LibWeb/HTML/Scripting/Environments.h b/Libraries/LibWeb/HTML/Scripting/Environments.h
index ad9d5e08ea2..84486042140 100644
--- a/Libraries/LibWeb/HTML/Scripting/Environments.h
+++ b/Libraries/LibWeb/HTML/Scripting/Environments.h
@@ -91,8 +91,8 @@ public:
     // https://html.spec.whatwg.org/multipage/webappapis.html#concept-settings-object-time-origin
     virtual double time_origin() const = 0;
 
-    URL::URL parse_url(StringView);
-    URL::URL encoding_parse_url(StringView);
+    Optional<URL::URL> parse_url(StringView);
+    Optional<URL::URL> encoding_parse_url(StringView);
     Optional<String> encoding_parse_and_serialize_url(StringView);
 
     JS::Realm& realm();
diff --git a/Libraries/LibWeb/HTML/Worker.cpp b/Libraries/LibWeb/HTML/Worker.cpp
index 390f9385f0c..568cb10b514 100644
--- a/Libraries/LibWeb/HTML/Worker.cpp
+++ b/Libraries/LibWeb/HTML/Worker.cpp
@@ -63,7 +63,7 @@ WebIDL::ExceptionOr<GC::Ref<Worker>> Worker::create(String const& script_url, Wo
     auto url = outside_settings.parse_url(script_url);
 
     // 4. If this fails, throw a "SyntaxError" DOMException.
-    if (!url.is_valid()) {
+    if (!url.has_value()) {
         dbgln_if(WEB_WORKER_DEBUG, "WebWorker: Invalid URL loaded '{}'.", script_url);
         return WebIDL::SyntaxError::create(document.realm(), "url is not valid"_string);
     }
@@ -82,7 +82,7 @@ WebIDL::ExceptionOr<GC::Ref<Worker>> Worker::create(String const& script_url, Wo
 
     // 9. Run this step in parallel:
     //    1. Run a worker given worker, worker URL, outside settings, outside port, and options.
-    worker->run_a_worker(url, outside_settings, *outside_port, options);
+    worker->run_a_worker(url.value(), outside_settings, *outside_port, options);
 
     // 10. Return worker
     return worker;
diff --git a/Libraries/LibWeb/HTML/WorkerGlobalScope.cpp b/Libraries/LibWeb/HTML/WorkerGlobalScope.cpp
index 2d85e72ed7b..12455cd4030 100644
--- a/Libraries/LibWeb/HTML/WorkerGlobalScope.cpp
+++ b/Libraries/LibWeb/HTML/WorkerGlobalScope.cpp
@@ -106,11 +106,11 @@ WebIDL::ExceptionOr<void> WorkerGlobalScope::import_scripts(Vector<String> const
         auto url_record = settings_object.encoding_parse_url(url);
 
         // 2. If urlRecord is failure, then throw a "SyntaxError" DOMException.
-        if (!url_record.is_valid())
+        if (!url_record.has_value())
             return WebIDL::SyntaxError::create(realm(), "Invalid URL"_string);
 
         // 3. Append urlRecord to urlRecords.
-        url_records.unchecked_append(url_record);
+        url_records.unchecked_append(url_record.release_value());
     }
 
     // 6. For each urlRecord of urlRecords: