diff --git a/Userland/Libraries/LibWeb/Animations/Animation.cpp b/Userland/Libraries/LibWeb/Animations/Animation.cpp
index b62e47a1d0..cb6a503fcc 100644
--- a/Userland/Libraries/LibWeb/Animations/Animation.cpp
+++ b/Userland/Libraries/LibWeb/Animations/Animation.cpp
@@ -14,6 +14,7 @@
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/HTML/Scripting/TemporaryExecutionContext.h>
 #include <LibWeb/HTML/Window.h>
+#include <LibWeb/HighResolutionTime/Performance.h>
 #include <LibWeb/WebIDL/ExceptionOr.h>
 #include <LibWeb/WebIDL/Promise.h>
 
@@ -661,7 +662,7 @@ WebIDL::ExceptionOr<void> Animation::play_an_animation(AutoRewind auto_rewind)
     //     If a user agent determines that animation is immediately ready, it may schedule the above task as a microtask
     //     such that it runs at the next microtask checkpoint, but it must not perform the task synchronously.
     m_pending_play_task = TaskState::Scheduled;
-    m_saved_play_time = MonotonicTime::now().milliseconds();
+    m_saved_play_time = global_object().performance()->now();
 
     // 13. Run the procedure to update an animation’s finished state for animation with the did seek flag set to false,
     //     and the synchronously notify flag set to false.
@@ -745,7 +746,7 @@ WebIDL::ExceptionOr<void> Animation::pause()
     //
     // Note: This is run_pending_pause_task()
     m_pending_pause_task = TaskState::Scheduled;
-    m_saved_pause_time = MonotonicTime::now().milliseconds();
+    m_saved_pause_time = global_object().performance()->now();
 
     // 11. Run the procedure to update an animation’s finished state for animation with the did seek flag set to false,
     //     and the synchronously notify flag set to false.
diff --git a/Userland/Libraries/LibWeb/Animations/DocumentTimeline.cpp b/Userland/Libraries/LibWeb/Animations/DocumentTimeline.cpp
index a9f43730bf..6982cc3512 100644
--- a/Userland/Libraries/LibWeb/Animations/DocumentTimeline.cpp
+++ b/Userland/Libraries/LibWeb/Animations/DocumentTimeline.cpp
@@ -9,6 +9,7 @@
 #include <LibWeb/Animations/DocumentTimeline.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/HTML/Window.h>
+#include <LibWeb/HighResolutionTime/Performance.h>
 #include <LibWeb/WebIDL/ExceptionOr.h>
 
 namespace Web::Animations {
@@ -17,7 +18,9 @@ JS_DEFINE_ALLOCATOR(DocumentTimeline);
 
 JS::NonnullGCPtr<DocumentTimeline> DocumentTimeline::create(JS::Realm& realm, DOM::Document& document, HighResolutionTime::DOMHighResTimeStamp origin_time)
 {
-    return realm.heap().allocate<DocumentTimeline>(realm, realm, document, origin_time);
+    auto timeline = realm.heap().allocate<DocumentTimeline>(realm, realm, document, origin_time);
+    timeline->set_current_time(document.window().performance()->now());
+    return timeline;
 }
 
 // https://www.w3.org/TR/web-animations-1/#dom-documenttimeline-documenttimeline
diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index 34ff642720..2aad5211d6 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -92,6 +92,7 @@
 #include <LibWeb/HTML/TraversableNavigable.h>
 #include <LibWeb/HTML/Window.h>
 #include <LibWeb/HTML/WindowProxy.h>
+#include <LibWeb/HighResolutionTime/Performance.h>
 #include <LibWeb/HighResolutionTime/TimeOrigin.h>
 #include <LibWeb/Infra/CharacterTypes.h>
 #include <LibWeb/Infra/Strings.h>
@@ -3847,10 +3848,8 @@ JS::NonnullGCPtr<Animations::DocumentTimeline> Document::timeline()
 {
     // The DocumentTimeline object representing the default document timeline. The default document timeline has an
     // origin time of zero.
-    if (!m_default_timeline) {
+    if (!m_default_timeline)
         m_default_timeline = Animations::DocumentTimeline::create(realm(), *this, 0.0);
-        m_default_timeline->set_current_time(MonotonicTime::now().milliseconds());
-    }
     return *m_default_timeline;
 }
 
@@ -4037,7 +4036,7 @@ void Document::ensure_animation_timer()
                 return;
             }
 
-            update_animations_and_send_events(MonotonicTime::now().milliseconds());
+            update_animations_and_send_events(window().performance()->now());
 
             for (auto& timeline : m_associated_animation_timelines) {
                 for (auto& animation : timeline->associated_animations())