diff --git a/docshell/base/WindowContext.cpp b/docshell/base/WindowContext.cpp
index 89b2c7b2ccad..a9760ed85f64 100644
--- a/docshell/base/WindowContext.cpp
+++ b/docshell/base/WindowContext.cpp
@@ -200,6 +200,12 @@ bool WindowContext::CanSet(FieldIndex<IDX_ShortcutsPermission>,
   return IsTop() && CheckOnlyOwningProcessCanSet(aSource);
 }
 
+bool WindowContext::CanSet(FieldIndex<IDX_ActiveMediaSessionContextId>,
+                           const Maybe<uint64_t>& aValue,
+                           ContentParent* aSource) {
+  return IsTop();
+}
+
 bool WindowContext::CanSet(FieldIndex<IDX_PopupPermission>, const uint32_t&,
                            ContentParent* aSource) {
   return CheckOnlyOwningProcessCanSet(aSource);
diff --git a/docshell/base/WindowContext.h b/docshell/base/WindowContext.h
index 8db6ebbb0b42..4335cd31f7a8 100644
--- a/docshell/base/WindowContext.h
+++ b/docshell/base/WindowContext.h
@@ -64,6 +64,9 @@ class BrowsingContextGroup;
   FIELD(DocTreeHadAudibleMedia, bool)                                  \
   FIELD(AutoplayPermission, uint32_t)                                  \
   FIELD(ShortcutsPermission, uint32_t)                                 \
+  /* Store the Id of the browsing context where active media session   \
+   * exists on the top level window context */                         \
+  FIELD(ActiveMediaSessionContextId, Maybe<uint64_t>)                  \
   /* ALLOW_ACTION if it is allowed to open popups for the sub-tree     \
    * starting and including the current WindowContext */               \
   FIELD(PopupPermission, uint32_t)                                     \
@@ -213,6 +216,8 @@ class WindowContext : public nsISupports, public nsWrapperCache {
               ContentParent* aSource);
   bool CanSet(FieldIndex<IDX_ShortcutsPermission>, const uint32_t& aValue,
               ContentParent* aSource);
+  bool CanSet(FieldIndex<IDX_ActiveMediaSessionContextId>,
+              const Maybe<uint64_t>& aValue, ContentParent* aSource);
   bool CanSet(FieldIndex<IDX_PopupPermission>, const uint32_t&,
               ContentParent* aSource);
   bool CanSet(FieldIndex<IDX_SHEntryHasUserInteraction>,
diff --git a/dom/media/mediacontrol/MediaStatusManager.cpp b/dom/media/mediacontrol/MediaStatusManager.cpp
index 05f30e9de95a..84b1e0d93336 100644
--- a/dom/media/mediacontrol/MediaStatusManager.cpp
+++ b/dom/media/mediacontrol/MediaStatusManager.cpp
@@ -141,6 +141,7 @@ void MediaStatusManager::SetActiveMediaSessionContextId(
     return;
   }
   mActiveMediaSessionContextId = Some(aBrowsingContextId);
+  StoreMediaSessionContextIdOnWindowContext();
   LOG("context %" PRIu64 " becomes active session context",
       *mActiveMediaSessionContextId);
   mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
@@ -153,10 +154,20 @@ void MediaStatusManager::ClearActiveMediaSessionContextIdIfNeeded() {
   }
   LOG("Clear active session context");
   mActiveMediaSessionContextId.reset();
+  StoreMediaSessionContextIdOnWindowContext();
   mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
   mSupportedActionsChangedEvent.Notify(GetSupportedActions());
 }
 
+void MediaStatusManager::StoreMediaSessionContextIdOnWindowContext() {
+  RefPtr<CanonicalBrowsingContext> bc =
+      CanonicalBrowsingContext::Get(mTopLevelBrowsingContextId);
+  if (bc && bc->GetTopWindowContext()) {
+    Unused << bc->GetTopWindowContext()->SetActiveMediaSessionContextId(
+        mActiveMediaSessionContextId);
+  }
+}
+
 bool MediaStatusManager::IsSessionOwningAudioFocus(
     uint64_t aBrowsingContextId) const {
   Maybe<uint64_t> audioFocusContextId =
diff --git a/dom/media/mediacontrol/MediaStatusManager.h b/dom/media/mediacontrol/MediaStatusManager.h
index 4eaa31d28242..5fc766e77395 100644
--- a/dom/media/mediacontrol/MediaStatusManager.h
+++ b/dom/media/mediacontrol/MediaStatusManager.h
@@ -228,6 +228,8 @@ class MediaStatusManager : public IMediaInfoUpdater {
   // media event.
   CopyableTArray<MediaSessionAction> GetSupportedActions() const;
 
+  void StoreMediaSessionContextIdOnWindowContext();
+
   // When the amount of playing media changes, we would use this function to
   // update the guessed playback state.
   void SetGuessedPlayState(MediaSessionPlaybackState aState);
diff --git a/dom/media/mediasession/MediaSession.cpp b/dom/media/mediasession/MediaSession.cpp
index 7ccf7865c4e4..6b6907dbc58d 100644
--- a/dom/media/mediasession/MediaSession.cpp
+++ b/dom/media/mediasession/MediaSession.cpp
@@ -7,8 +7,16 @@
 #include "mozilla/dom/BrowsingContext.h"
 #include "mozilla/dom/ContentMediaController.h"
 #include "mozilla/dom/MediaSession.h"
+#include "mozilla/dom/MediaControlUtils.h"
+#include "mozilla/dom/WindowContext.h"
 #include "mozilla/EnumeratedArrayCycleCollection.h"
 
+// avoid redefined macro in unified build
+#undef LOG
+#define LOG(msg, ...)                        \
+  MOZ_LOG(gMediaControlLog, LogLevel::Debug, \
+          ("MediaSession=%p, " msg, this, ##__VA_ARGS__))
+
 namespace mozilla {
 namespace dom {
 
@@ -166,6 +174,22 @@ bool MediaSession::IsSupportedAction(MediaSessionAction aAction) const {
   return mActionHandlers[aAction] != nullptr;
 }
 
+bool MediaSession::IsActive() const {
+  RefPtr<BrowsingContext> currentBC = GetParentObject()->GetBrowsingContext();
+  MOZ_ASSERT(currentBC);
+  RefPtr<WindowContext> wc = currentBC->GetTopWindowContext();
+  if (!wc) {
+    return false;
+  }
+  Maybe<uint64_t> activeSessionContextId = wc->GetActiveMediaSessionContextId();
+  if (!activeSessionContextId) {
+    return false;
+  }
+  LOG("session context Id=%" PRIu64 ", active session context Id=%" PRIu64,
+      currentBC->Id(), *activeSessionContextId);
+  return *activeSessionContextId == currentBC->Id();
+}
+
 void MediaSession::Shutdown() {
   NotifyMediaSessionStatus(SessionStatus::eDestroyed);
 }
diff --git a/dom/media/mediasession/MediaSession.h b/dom/media/mediasession/MediaSession.h
index 9e630b4f63db..82beee7e8ad8 100644
--- a/dom/media/mediasession/MediaSession.h
+++ b/dom/media/mediasession/MediaSession.h
@@ -69,6 +69,14 @@ class MediaSession final : public nsISupports, public nsWrapperCache {
 
   void Shutdown();
 
+  // `MediaStatusManager` would determine which media session is an active media
+  // session and update it from the chrome process. This active session is not
+  // 100% equal to the active media session in the spec, which is a globally
+  // active media session *among all tabs*. The active session here is *among
+  // different windows but in same tab*, so each tab can have at most one
+  // active media session.
+  bool IsActive() const;
+
  private:
   // Propagate media context status to the media session controller in the
   // chrome process when we create or destroy the media session.