diff --git a/Userland/Libraries/LibWeb/Cookie/ParsedCookie.cpp b/Userland/Libraries/LibWeb/Cookie/ParsedCookie.cpp
index e77bc118bbf..67b34d3b700 100644
--- a/Userland/Libraries/LibWeb/Cookie/ParsedCookie.cpp
+++ b/Userland/Libraries/LibWeb/Cookie/ParsedCookie.cpp
@@ -173,7 +173,7 @@ void on_max_age_attribute(ParsedCookie& parsed_cookie, StringView attribute_valu
             parsed_cookie.expiry_time_from_max_age_attribute = UnixDateTime::earliest();
         } else {
             // Otherwise, let the expiry-time be the current date and time plus delta-seconds seconds.
-            parsed_cookie.expiry_time_from_max_age_attribute = UnixDateTime::now() + Duration::from_seconds(*delta_seconds);
+            parsed_cookie.expiry_time_from_max_age_attribute = UnixDateTime::now() + AK::Duration::from_seconds(*delta_seconds);
         }
     }
 }
diff --git a/Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.cpp b/Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.cpp
index a38760e724f..8389254ac69 100644
--- a/Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.cpp
+++ b/Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.cpp
@@ -233,24 +233,24 @@ bool Response::is_stale() const
 u64 Response::current_age() const
 {
     // The term "age_value" denotes the value of the Age header field (Section 5.1), in a form appropriate for arithmetic operation; or 0, if not available.
-    Optional<Duration> age;
+    Optional<AK::Duration> age;
     if (auto const age_header = header_list()->get("Age"sv.bytes()); age_header.has_value()) {
         if (auto converted_age = StringView { *age_header }.to_number<u64>(); converted_age.has_value())
-            age = Duration::from_seconds(converted_age.value());
+            age = AK::Duration::from_seconds(converted_age.value());
     }
 
-    auto const age_value = age.value_or(Duration::from_seconds(0));
+    auto const age_value = age.value_or(AK::Duration::from_seconds(0));
 
     // The term "date_value" denotes the value of the Date header field, in a form appropriate for arithmetic operations. See Section 6.6.1 of [HTTP] for the definition of the Date header field and for requirements regarding responses without it.
     // FIXME: Do we have a parser for HTTP-date?
-    auto const date_value = UnixDateTime::now() - Duration::from_seconds(5);
+    auto const date_value = UnixDateTime::now() - AK::Duration::from_seconds(5);
 
     // The term "now" means the current value of this implementation's clock (Section 5.6.7 of [HTTP]).
     auto const now = UnixDateTime::now();
 
     // The value of the clock at the time of the request that resulted in the stored response.
     // FIXME: Let's get the correct time.
-    auto const request_time = UnixDateTime::now() - Duration::from_seconds(5);
+    auto const request_time = UnixDateTime::now() - AK::Duration::from_seconds(5);
 
     // The value of the clock at the time the response was received.
     auto const response_time = m_response_time;
diff --git a/Userland/Libraries/LibWeb/HTML/AudioTrack.cpp b/Userland/Libraries/LibWeb/HTML/AudioTrack.cpp
index 5f5e1395be0..570e06ad778 100644
--- a/Userland/Libraries/LibWeb/HTML/AudioTrack.cpp
+++ b/Userland/Libraries/LibWeb/HTML/AudioTrack.cpp
@@ -70,7 +70,7 @@ void AudioTrack::pause(Badge<HTMLAudioElement>)
     m_audio_plugin->pause_playback();
 }
 
-Duration AudioTrack::duration()
+AK::Duration AudioTrack::duration()
 {
     return m_audio_plugin->duration();
 }
diff --git a/Userland/Libraries/LibWeb/HTML/AudioTrack.h b/Userland/Libraries/LibWeb/HTML/AudioTrack.h
index 47823091e42..76f6f1c3af7 100644
--- a/Userland/Libraries/LibWeb/HTML/AudioTrack.h
+++ b/Userland/Libraries/LibWeb/HTML/AudioTrack.h
@@ -25,7 +25,7 @@ public:
     void play(Badge<HTMLAudioElement>);
     void pause(Badge<HTMLAudioElement>);
 
-    Duration duration();
+    AK::Duration duration();
     void seek(double, MediaSeekMode);
 
     void update_volume();
diff --git a/Userland/Libraries/LibWeb/HTML/EventSource.cpp b/Userland/Libraries/LibWeb/HTML/EventSource.cpp
index b364e703116..a0fa53edde7 100644
--- a/Userland/Libraries/LibWeb/HTML/EventSource.cpp
+++ b/Userland/Libraries/LibWeb/HTML/EventSource.cpp
@@ -399,7 +399,7 @@ void EventSource::process_field(StringView field, StringView value)
         // If the field value consists of only ASCII digits, then interpret the field value as an integer in base ten,
         // and set the event stream's reconnection time to that integer. Otherwise, ignore the field.
         if (auto retry = value.to_number<i64>(); retry.has_value())
-            m_reconnection_time = Duration::from_seconds(*retry);
+            m_reconnection_time = AK::Duration::from_seconds(*retry);
     }
     // -> Otherwise
     else {
diff --git a/Userland/Libraries/LibWeb/HTML/EventSource.h b/Userland/Libraries/LibWeb/HTML/EventSource.h
index 26998dd0eaf..b6185f3333c 100644
--- a/Userland/Libraries/LibWeb/HTML/EventSource.h
+++ b/Userland/Libraries/LibWeb/HTML/EventSource.h
@@ -82,7 +82,7 @@ private:
     JS::GCPtr<Fetch::Infrastructure::Request> m_request;
 
     // https://html.spec.whatwg.org/multipage/server-sent-events.html#concept-event-stream-reconnection-time
-    Duration m_reconnection_time { Duration::from_seconds(3) };
+    AK::Duration m_reconnection_time { AK::Duration::from_seconds(3) };
 
     // https://html.spec.whatwg.org/multipage/server-sent-events.html#concept-event-stream-last-event-id
     String m_last_event_id;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
index ece05e94f2d..bf3f1df02b0 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
@@ -957,7 +957,7 @@ Vector<FlyString> HTMLFormElement::supported_property_names() const
             Name,
             Past,
         } source;
-        Duration age;
+        AK::Duration age;
     };
     Vector<SourcedName> sourced_names;
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.cpp
index fb9bcd753bb..9d445ecdd79 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.cpp
@@ -132,7 +132,7 @@ void HTMLVideoElement::on_paused()
 void HTMLVideoElement::on_seek(double position, MediaSeekMode seek_mode)
 {
     if (m_video_track)
-        m_video_track->seek(Duration::from_milliseconds(position * 1000.0), seek_mode);
+        m_video_track->seek(AK::Duration::from_milliseconds(position * 1000.0), seek_mode);
 }
 
 // https://html.spec.whatwg.org/multipage/media.html#attr-video-poster
diff --git a/Userland/Libraries/LibWeb/HTML/VideoTrack.cpp b/Userland/Libraries/LibWeb/HTML/VideoTrack.cpp
index 4c0eb73972a..751fc90b65a 100644
--- a/Userland/Libraries/LibWeb/HTML/VideoTrack.cpp
+++ b/Userland/Libraries/LibWeb/HTML/VideoTrack.cpp
@@ -103,17 +103,17 @@ void VideoTrack::stop_video(Badge<HTMLVideoElement>)
     m_playback_manager->terminate_playback();
 }
 
-Duration VideoTrack::position() const
+AK::Duration VideoTrack::position() const
 {
     return m_playback_manager->current_playback_time();
 }
 
-Duration VideoTrack::duration() const
+AK::Duration VideoTrack::duration() const
 {
     return m_playback_manager->selected_video_track().video_data().duration;
 }
 
-void VideoTrack::seek(Duration position, MediaSeekMode seek_mode)
+void VideoTrack::seek(AK::Duration position, MediaSeekMode seek_mode)
 {
     switch (seek_mode) {
     case MediaSeekMode::Accurate:
diff --git a/Userland/Libraries/LibWeb/HTML/VideoTrack.h b/Userland/Libraries/LibWeb/HTML/VideoTrack.h
index 042fbce9427..1ed8b3e45ef 100644
--- a/Userland/Libraries/LibWeb/HTML/VideoTrack.h
+++ b/Userland/Libraries/LibWeb/HTML/VideoTrack.h
@@ -27,9 +27,9 @@ public:
     void pause_video(Badge<HTMLVideoElement>);
     void stop_video(Badge<HTMLVideoElement>);
 
-    Duration position() const;
-    Duration duration() const;
-    void seek(Duration, MediaSeekMode);
+    AK::Duration position() const;
+    AK::Duration duration() const;
+    void seek(AK::Duration, MediaSeekMode);
 
     u64 pixel_width() const;
     u64 pixel_height() const;
diff --git a/Userland/Libraries/LibWeb/Loader/LoadRequest.h b/Userland/Libraries/LibWeb/Loader/LoadRequest.h
index 08d78b223b6..ef70a560c7a 100644
--- a/Userland/Libraries/LibWeb/Loader/LoadRequest.h
+++ b/Userland/Libraries/LibWeb/Loader/LoadRequest.h
@@ -41,7 +41,7 @@ public:
     void set_body(ByteBuffer body) { m_body = move(body); }
 
     void start_timer() { m_load_timer.start(); }
-    Duration load_time() const { return m_load_timer.elapsed_time(); }
+    AK::Duration load_time() const { return m_load_timer.elapsed_time(); }
 
     JS::GCPtr<Page> page() const { return m_page.ptr(); }
     void set_page(Page& page) { m_page = page; }
diff --git a/Userland/Libraries/LibWeb/Platform/AudioCodecPlugin.cpp b/Userland/Libraries/LibWeb/Platform/AudioCodecPlugin.cpp
index 3e3c1ba54c6..e27672cd6f3 100644
--- a/Userland/Libraries/LibWeb/Platform/AudioCodecPlugin.cpp
+++ b/Userland/Libraries/LibWeb/Platform/AudioCodecPlugin.cpp
@@ -39,7 +39,7 @@ ErrorOr<FixedArray<Audio::Sample>> AudioCodecPlugin::read_samples_from_loader(Au
     return buffer_or_error.release_value();
 }
 
-Duration AudioCodecPlugin::set_loader_position(Audio::Loader& loader, double position, Duration duration)
+AK::Duration AudioCodecPlugin::set_loader_position(Audio::Loader& loader, double position, AK::Duration duration)
 {
     if (loader.total_samples() == 0)
         return current_loader_position(loader);
@@ -51,12 +51,12 @@ Duration AudioCodecPlugin::set_loader_position(Audio::Loader& loader, double pos
     return current_loader_position(loader);
 }
 
-Duration AudioCodecPlugin::current_loader_position(Audio::Loader const& loader)
+AK::Duration AudioCodecPlugin::current_loader_position(Audio::Loader const& loader)
 {
     auto samples_played = static_cast<double>(loader.loaded_samples());
     auto sample_rate = static_cast<double>(loader.sample_rate());
 
-    return Duration::from_milliseconds(static_cast<i64>(samples_played / sample_rate * 1000.0));
+    return AK::Duration::from_milliseconds(static_cast<i64>(samples_played / sample_rate * 1000.0));
 }
 
 }
diff --git a/Userland/Libraries/LibWeb/Platform/AudioCodecPlugin.h b/Userland/Libraries/LibWeb/Platform/AudioCodecPlugin.h
index 7cf0a540347..6b53f401b39 100644
--- a/Userland/Libraries/LibWeb/Platform/AudioCodecPlugin.h
+++ b/Userland/Libraries/LibWeb/Platform/AudioCodecPlugin.h
@@ -24,17 +24,17 @@ public:
     virtual ~AudioCodecPlugin();
 
     static ErrorOr<FixedArray<Audio::Sample>> read_samples_from_loader(Audio::Loader&, size_t samples_to_load);
-    static Duration set_loader_position(Audio::Loader&, double position, Duration duration);
-    static Duration current_loader_position(Audio::Loader const&);
+    static AK::Duration set_loader_position(Audio::Loader&, double position, AK::Duration duration);
+    static AK::Duration current_loader_position(Audio::Loader const&);
 
     virtual void resume_playback() = 0;
     virtual void pause_playback() = 0;
     virtual void set_volume(double) = 0;
     virtual void seek(double) = 0;
 
-    virtual Duration duration() = 0;
+    virtual AK::Duration duration() = 0;
 
-    Function<void(Duration)> on_playback_position_updated;
+    Function<void(AK::Duration)> on_playback_position_updated;
     Function<void(String)> on_decoder_error;
 
 protected:
diff --git a/Userland/Libraries/LibWeb/Platform/AudioCodecPluginAgnostic.cpp b/Userland/Libraries/LibWeb/Platform/AudioCodecPluginAgnostic.cpp
index e0cd413bb4d..aa4a4b01923 100644
--- a/Userland/Libraries/LibWeb/Platform/AudioCodecPluginAgnostic.cpp
+++ b/Userland/Libraries/LibWeb/Platform/AudioCodecPluginAgnostic.cpp
@@ -17,12 +17,12 @@ namespace Web::Platform {
 
 constexpr int update_interval = 50;
 
-static Duration timestamp_from_samples(i64 samples, u32 sample_rate)
+static AK::Duration timestamp_from_samples(i64 samples, u32 sample_rate)
 {
-    return Duration::from_milliseconds(samples * 1000 / sample_rate);
+    return AK::Duration::from_milliseconds(samples * 1000 / sample_rate);
 }
 
-static Duration get_loader_timestamp(NonnullRefPtr<Audio::Loader> const& loader)
+static AK::Duration get_loader_timestamp(NonnullRefPtr<Audio::Loader> const& loader)
 {
     return timestamp_from_samples(loader->loaded_samples(), loader->sample_rate());
 }
@@ -80,7 +80,7 @@ ErrorOr<NonnullOwnPtr<AudioCodecPluginAgnostic>> AudioCodecPluginAgnostic::creat
     return plugin;
 }
 
-AudioCodecPluginAgnostic::AudioCodecPluginAgnostic(NonnullRefPtr<Audio::Loader> loader, Duration duration, NonnullRefPtr<Core::Timer> update_timer)
+AudioCodecPluginAgnostic::AudioCodecPluginAgnostic(NonnullRefPtr<Audio::Loader> loader, AK::Duration duration, NonnullRefPtr<Core::Timer> update_timer)
     : m_loader(move(loader))
     , m_duration(duration)
     , m_main_thread_event_loop(Core::EventLoop::current())
@@ -95,7 +95,7 @@ void AudioCodecPluginAgnostic::resume_playback()
 {
     m_paused = false;
     m_output->resume()
-        ->when_resolved([this](Duration new_device_time) {
+        ->when_resolved([this](AK::Duration new_device_time) {
             m_main_thread_event_loop.deferred_invoke([this, new_device_time]() {
                 m_last_resume_in_device_time = new_device_time;
                 m_update_timer->start();
@@ -164,7 +164,7 @@ void AudioCodecPluginAgnostic::seek(double position)
         });
 }
 
-Duration AudioCodecPluginAgnostic::duration()
+AK::Duration AudioCodecPluginAgnostic::duration()
 {
     return m_duration;
 }
diff --git a/Userland/Libraries/LibWeb/Platform/AudioCodecPluginAgnostic.h b/Userland/Libraries/LibWeb/Platform/AudioCodecPluginAgnostic.h
index 12b5103720d..eda9b51977e 100644
--- a/Userland/Libraries/LibWeb/Platform/AudioCodecPluginAgnostic.h
+++ b/Userland/Libraries/LibWeb/Platform/AudioCodecPluginAgnostic.h
@@ -20,19 +20,19 @@ public:
     virtual void set_volume(double) override;
     virtual void seek(double) override;
 
-    virtual Duration duration() override;
+    virtual AK::Duration duration() override;
 
 private:
-    explicit AudioCodecPluginAgnostic(NonnullRefPtr<Audio::Loader> loader, Duration, NonnullRefPtr<Core::Timer> update_timer);
+    explicit AudioCodecPluginAgnostic(NonnullRefPtr<Audio::Loader> loader, AK::Duration, NonnullRefPtr<Core::Timer> update_timer);
 
     void update_timestamp();
 
     NonnullRefPtr<Audio::Loader> m_loader;
     RefPtr<Audio::PlaybackStream> m_output { nullptr };
-    Duration m_duration { Duration::zero() };
-    Duration m_last_resume_in_media_time { Duration::zero() };
-    Duration m_last_resume_in_device_time { Duration::zero() };
-    Duration m_last_good_device_time { Duration::zero() };
+    AK::Duration m_duration { AK::Duration::zero() };
+    AK::Duration m_last_resume_in_media_time { AK::Duration::zero() };
+    AK::Duration m_last_resume_in_device_time { AK::Duration::zero() };
+    AK::Duration m_last_good_device_time { AK::Duration::zero() };
     Core::EventLoop& m_main_thread_event_loop;
     NonnullRefPtr<Core::Timer> m_update_timer;
     bool m_paused { true };
diff --git a/Userland/Libraries/LibWeb/WebDriver/ExecuteScript.cpp b/Userland/Libraries/LibWeb/WebDriver/ExecuteScript.cpp
index 0821d169f72..5dcdf6e0d78 100644
--- a/Userland/Libraries/LibWeb/WebDriver/ExecuteScript.cpp
+++ b/Userland/Libraries/LibWeb/WebDriver/ExecuteScript.cpp
@@ -332,7 +332,7 @@ ExecuteScriptResultSerialized execute_async_script(Web::Page& page, ByteString c
     auto start = MonotonicTime::now();
 
     auto has_timed_out = [&] {
-        return timeout.has_value() && (MonotonicTime::now() - start) > Duration::from_seconds(static_cast<i64>(*timeout));
+        return timeout.has_value() && (MonotonicTime::now() - start) > AK::Duration::from_seconds(static_cast<i64>(*timeout));
     };
 
     // AD-HOC: An execution context is required for Promise creation hooks.