DragService creating toplevel QWidget in ctor which is bad and prevent gecko init in non-main thread
Created attachment 563657 [details] [diff] [review] Stop creating QWidget in dragservice ctor
Created attachment 563662 [details] [diff] [review] Don't use main-thread only functionality in non-main thread Oh, found that we also should not install XEvent handler in non-main thread. Also added check new QWidget and prevent that calling in non-main thread.
Created attachment 563675 [details] [diff] [review] Don't use main-thread only functionality in non-main thread
In my queue, which is heading to try first then inbound :-) https://tbpl.mozilla.org/?tree=Try&rev=a8fbb2a76633