diff --git a/dom/base/nsINode.h b/dom/base/nsINode.h
index f8b318687e62..4643275eb351 100644
--- a/dom/base/nsINode.h
+++ b/dom/base/nsINode.h
@@ -597,15 +597,13 @@ class nsINode : public mozilla::dom::EventTarget {
    *
    * For all other cases OwnerDoc and GetOwnerDocument behave identically.
    */
-  Document* OwnerDoc() const MOZ_NONNULL_RETURN {
-    return mNodeInfo->GetDocument();
-  }
+  Document* OwnerDoc() const { return mNodeInfo->GetDocument(); }
 
   /**
    * Return the "owner document" of this node as an nsINode*.  Implemented
    * in Document.h.
    */
-  inline nsINode* OwnerDocAsNode() const MOZ_NONNULL_RETURN;
+  inline nsINode* OwnerDocAsNode() const;
 
   /**
    * Returns true if the content has an ancestor that is a document.
diff --git a/dom/html/HTMLMediaElement.cpp b/dom/html/HTMLMediaElement.cpp
index 93c352459ac3..d0aee56067ae 100644
--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -2175,7 +2175,7 @@ void HTMLMediaElement::Load() {
        HasAttr(kNameSpaceID_None, nsGkAtoms::autoplay),
        AutoplayPolicy::IsAllowedToPlay(*this), OwnerDoc(),
        DocumentOrigin(OwnerDoc()).get(),
-       OwnerDoc()->HasBeenUserGestureActivated(), mMuted,
+       OwnerDoc() ? OwnerDoc()->HasBeenUserGestureActivated() : 0, mMuted,
        mVolume));
 
   if (mIsRunningLoadMethod) {
diff --git a/dom/plugins/base/nsPluginInstanceOwner.cpp b/dom/plugins/base/nsPluginInstanceOwner.cpp
index b1130f9de832..b46e9ab4f038 100644
--- a/dom/plugins/base/nsPluginInstanceOwner.cpp
+++ b/dom/plugins/base/nsPluginInstanceOwner.cpp
@@ -3163,7 +3163,7 @@ void nsPluginInstanceOwner::SetFrame(nsPluginFrame* aFrame) {
 
   // If we already have a frame that is changing or going away...
   if (mPluginFrame) {
-    if (content && content->OwnerDoc()->GetWindow()) {
+    if (content && content->OwnerDoc() && content->OwnerDoc()->GetWindow()) {
       nsCOMPtr<EventTarget> windowRoot =
           content->OwnerDoc()->GetWindow()->GetTopWindowRoot();
       if (windowRoot) {