--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -7542,20 +7542,22 @@ HTMLMediaElement::MarkAsTainted()
 {
   mHasSuspendTaint = true;
 
   if (mDecoder) {
     mDecoder->SetSuspendTaint(true);
   }
 }
 
-bool HasDebuggerPrivilege(JSContext* aCx, JSObject* aObj)
+bool
+HasDebuggerOrTabsPrivilege(JSContext* aCx, JSObject* aObj)
 {
   return nsContentUtils::CallerHasPermission(aCx,
-                                             NS_LITERAL_STRING("debugger"));
+                                             NS_LITERAL_STRING("debugger")) ||
+         nsContentUtils::CallerHasPermission(aCx, NS_LITERAL_STRING("tabs"));
  }
 
 void
 HTMLMediaElement::AsyncResolveSeekDOMPromiseIfExists()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mSeekDOMPromise) {
     RefPtr<dom::Promise> promise = mSeekDOMPromise.forget();

--- a/dom/html/HTMLMediaElement.h
+++ b/dom/html/HTMLMediaElement.h
@@ -1795,15 +1795,16 @@ private:
   nsTArray<nsResolveOrRejectPendingPlayPromisesRunner*> mPendingPlayPromisesRunners;
 
   // A pending seek promise which is created at Seek() method call and is
   // resolved/rejected at AsyncResolveSeekDOMPromiseIfExists()/
   // AsyncRejectSeekDOMPromiseIfExists() methods.
   RefPtr<dom::Promise> mSeekDOMPromise;
 };
 
-// Check if the context is chrome or has the debugger permission
-bool HasDebuggerPrivilege(JSContext* aCx, JSObject* aObj);
+// Check if the context is chrome or has the debugger or tabs permission
+bool
+HasDebuggerOrTabsPrivilege(JSContext* aCx, JSObject* aObj);
 
 } // namespace dom
 } // namespace mozilla
 
 #endif // mozilla_dom_HTMLMediaElement_h

--- a/dom/webidl/HTMLMediaElement.webidl
+++ b/dom/webidl/HTMLMediaElement.webidl
@@ -95,21 +95,21 @@ interface HTMLMediaElement : HTMLElement
   readonly attribute TextTrackList? textTracks;
   TextTrack addTextTrack(TextTrackKind kind,
                          optional DOMString label = "",
                          optional DOMString language = "");
 };
 
 // Mozilla extensions:
 partial interface HTMLMediaElement {
-  [Func="HasDebuggerPrivilege"]
+  [Func="HasDebuggerOrTabsPrivilege"]
   readonly attribute MediaSource? mozMediaSourceObject;
-  [Func="HasDebuggerPrivilege"]
+  [Func="HasDebuggerOrTabsPrivilege"]
   readonly attribute DOMString mozDebugReaderData;
-  [Func="HasDebuggerPrivilege", NewObject]
+  [Func="HasDebuggerOrTabsPrivilege", NewObject]
   Promise<DOMString> mozRequestDebugInfo();
 
   [Pref="media.test.dumpDebugInfo"]
   void mozDumpDebugInfo();
 
   attribute MediaStream? srcObject;
   // TODO: remove prefixed version soon (1183495).
   attribute MediaStream? mozSrcObject;