--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -3966,17 +3966,16 @@ HTMLMediaElement::HTMLMediaElement(alrea
     mFragmentEnd(-1.0),
     mDefaultPlaybackRate(1.0),
     mPlaybackRate(1.0),
     mPreservesPitch(true),
     mPlayed(new TimeRanges(ToSupports(OwnerDoc()))),
     mCurrentPlayRangeStart(-1.0),
     mLoadedDataFired(false),
     mAutoplaying(true),
-    mAutoplayEnabled(true),
     mPaused(true, *this),
     mStatsShowing(false),
     mAllowCasting(false),
     mIsCasting(false),
     mAudioCaptured(false),
     mPlayingBeforeSeek(false),
     mPausedForInactiveDocumentOrChannel(false),
     mEventDeliveryPaused(false),
@@ -4514,19 +4513,16 @@ nsresult HTMLMediaElement::BindToTree(ns
   nsresult rv = nsGenericHTMLElement::BindToTree(aDocument,
                                                  aParent,
                                                  aBindingParent,
                                                  aCompileEventHandlers);
 
   mUnboundFromTree = false;
 
   if (aDocument) {
-    mAutoplayEnabled =
-      IsAutoplayEnabled() && (!aDocument || !aDocument->IsStaticDocument()) &&
-      !IsEditable();
     // The preload action depends on the value of the autoplay attribute.
     // It's value may have changed, so update it.
     UpdatePreloadAction();
   }
 
   NotifyDecoderActivityChanges();
 
   return rv;
@@ -6101,17 +6097,21 @@ bool HTMLMediaElement::CanActivateAutopl
 {
   // For stream inputs, we activate autoplay on HAVE_NOTHING because
   // this element itself might be blocking the stream from making progress by
   // being paused. We only check that it has data by checking its active state.
   // We also activate autoplay when playing a media source since the data
   // download is controlled by the script and there is no way to evaluate
   // MediaDecoder::CanPlayThrough().
 
-  if (!HasAttr(kNameSpaceID_None, nsGkAtoms::autoplay) || !mAutoplayEnabled) {
+  if (!IsAutoplayEnabled()) {
+    return false;
+  }
+
+  if (!HasAttr(kNameSpaceID_None, nsGkAtoms::autoplay)) {
     return false;
   }
 
   if (!mAutoplaying) {
     return false;
   }
 
   if (IsEditable()) {
@@ -6121,16 +6121,21 @@ bool HTMLMediaElement::CanActivateAutopl
   if (!mPaused) {
     return false;
   }
 
   if (mPausedForInactiveDocumentOrChannel) {
     return false;
   }
 
+  // Static document is used for print preview and printing, should not be autoplay
+  if (OwnerDoc()->IsStaticDocument()) {
+    return false;
+  }
+
   if (mAudioChannelWrapper) {
     // Note: SUSPENDED_PAUSE and SUSPENDED_BLOCK will be merged into one single state.
     if (mAudioChannelWrapper->GetSuspendType() == nsISuspendedTypes::SUSPENDED_PAUSE ||
         mAudioChannelWrapper->GetSuspendType() == nsISuspendedTypes::SUSPENDED_BLOCK ||
         mAudioChannelWrapper->IsPlaybackBlocked()) {
       return false;
     }
   }

--- a/dom/html/HTMLMediaElement.h
+++ b/dom/html/HTMLMediaElement.h
@@ -1542,20 +1542,16 @@ protected:
   // latter case.
   // The 'autoplay' HTML attribute indicates that the video should
   // start playing when loaded. The 'autoplay' attribute of the object
   // is a mirror of the HTML attribute. These are different from this
   // 'mAutoplaying' flag, which indicates whether the current playback
   // is a result of the autoplay attribute.
   bool mAutoplaying;
 
-  // Indicates whether |autoplay| will actually autoplay based on the pref
-  // media.autoplay.enabled
-  bool mAutoplayEnabled;
-
   // Playback of the video is paused either due to calling the
   // 'Pause' method, or playback not yet having started.
   WakeLockBoolWrapper mPaused;
 
   // True if the media statistics are currently being shown by the builtin
   // video controls
   bool mStatsShowing;