--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -5291,16 +5291,17 @@ ContentParent::RecvCreateWindow(PBrowser
                                 bool* aWindowIsNew,
                                 InfallibleTArray<FrameScriptInfo>* aFrameScripts,
                                 nsCString* aURLToLoad,
                                 TextureFactoryIdentifier* aTextureFactoryIdentifier,
                                 uint64_t* aLayersId)
 {
   // We always expect to open a new window here. If we don't, it's an error.
   *aWindowIsNew = true;
+  *aResult = NS_OK;
 
   // The content process should never be in charge of computing whether or
   // not a window should be private or remote - the parent will do that.
   const uint32_t badFlags =
         nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW
       | nsIWebBrowserChrome::CHROME_NON_PRIVATE_WINDOW
       | nsIWebBrowserChrome::CHROME_PRIVATE_LIFETIME
       | nsIWebBrowserChrome::CHROME_REMOTE_WINDOW;