--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -529,19 +529,23 @@ HTMLMediaElement::MediaLoadListener::OnS
       element->NotifyLoadError();
     }
     return status;
   }
 
   nsCOMPtr<nsIHttpChannel> hc = do_QueryInterface(aRequest);
   bool succeeded;
   if (hc && NS_SUCCEEDED(hc->GetRequestSucceeded(&succeeded)) && !succeeded) {
-    element->NotifyLoadError();
     uint32_t responseStatus = 0;
     Unused << hc->GetResponseStatus(&responseStatus);
+    nsAutoCString statusText;
+    Unused << hc->GetResponseStatusText(statusText);
+    element->NotifyLoadError(
+      nsPrintfCString("%u: %s", responseStatus, statusText.get()));
+
     nsAutoString code;
     code.AppendInt(responseStatus);
     nsAutoString src;
     element->GetCurrentSrc(src);
     const char16_t* params[] = { code.get(), src.get() };
     element->ReportLoadError("MediaLoadHttpError", params, ArrayLength(params));
     return NS_BINDING_ABORTED;
   }
@@ -2041,21 +2045,22 @@ void HTMLMediaElement::SelectResource()
       this, &HTMLMediaElement::NoSupportedMediaSourceError, nsCString()));
   } else {
     // Otherwise, the source elements will be used.
     mIsLoadingFromSourceChildren = true;
     LoadFromSourceChildren();
   }
 }
 
-void HTMLMediaElement::NotifyLoadError()
+void
+HTMLMediaElement::NotifyLoadError(const nsACString& aErrorDetails)
 {
   if (!mIsLoadingFromSourceChildren) {
     LOG(LogLevel::Debug, ("NotifyLoadError(), no supported media error"));
-    NoSupportedMediaSourceError();
+    NoSupportedMediaSourceError(aErrorDetails);
   } else if (mSourceLoadCandidate) {
     DispatchAsyncSourceError(mSourceLoadCandidate);
     QueueLoadFromSourceTask();
   } else {
     NS_WARNING("Should know the source we were loading from!");
   }
 }
 

--- a/dom/html/HTMLMediaElement.h
+++ b/dom/html/HTMLMediaElement.h
@@ -326,17 +326,17 @@ public:
    * may queue a task to run the select resource algorithm if appropriate.
    */
   void NotifyAddedSource();
 
   /**
    * Called when there's been an error fetching the resource. This decides
    * whether it's appropriate to fire an error event.
    */
-  void NotifyLoadError();
+  void NotifyLoadError(const nsACString& aErrorDetails = nsCString());
 
   /**
    * Called by one of our associated MediaTrackLists (audio/video) when an
    * AudioTrack is enabled or a VideoTrack is selected.
    */
   void NotifyMediaTrackEnabled(MediaTrack* aTrack);
 
   /**