diff --git a/dom/html/HTMLMediaElement.h b/dom/html/HTMLMediaElement.h
index 78d007ced263..e158413f27a6 100644
--- a/dom/html/HTMLMediaElement.h
+++ b/dom/html/HTMLMediaElement.h
@@ -221,9 +221,9 @@ public:
   // suspended the channel.
   virtual void NotifySuspendedByCache(bool aSuspendedByCache) final override;
 
-  virtual bool IsActive() const final override;
+  bool IsActive() const;
 
-  virtual bool IsHidden() const final override;
+  bool IsHidden() const;
 
   // Called by the media decoder and the video frame to get the
   // ImageContainer containing the video data.
diff --git a/dom/media/MediaDecoderOwner.h b/dom/media/MediaDecoderOwner.h
index edc3029d16ab..051f171f767b 100644
--- a/dom/media/MediaDecoderOwner.h
+++ b/dom/media/MediaDecoderOwner.h
@@ -118,12 +118,6 @@ public:
     NEXT_FRAME_UNINITIALIZED
   };
 
-  // Check if the decoder owner is active.
-  virtual bool IsActive() const = 0;
-
-  // Check if the decoder owner is hidden.
-  virtual bool IsHidden() const = 0;
-
   // Called by media decoder when the audible state changed
   virtual void SetAudibleState(bool aAudible) = 0;
 
diff --git a/dom/media/gtest/MockMediaDecoderOwner.h b/dom/media/gtest/MockMediaDecoderOwner.h
index 3b9881cb3b40..43e69b586935 100644
--- a/dom/media/gtest/MockMediaDecoderOwner.h
+++ b/dom/media/gtest/MockMediaDecoderOwner.h
@@ -36,8 +36,6 @@ public:
   void FirstFrameLoaded() override {}
   void DispatchEncrypted(const nsTArray<uint8_t>& aInitData,
                          const nsAString& aInitDataType) override {}
-  bool IsActive() const override { return true; }
-  bool IsHidden() const override { return false; }
   void DownloadSuspended() override {}
   void DownloadResumed(bool aForceNetworkLoading) override {}
   void NotifySuspendedByCache(bool aIsSuspended) override {}