These tests cause a pile of assertions and the child process crashes. When dispatchEvent is called: ###!!! ASSERTION: This is unsafe! Fix the caller!: 'Error', file /builds/moz2/working/dom/events/EventDispatcher.cpp, line 487 #01: mozilla::EventDispatcher::DispatchDOMEvent(nsISupports*, mozilla::WidgetEvent*, nsIDOMEvent*, nsPresContext*, nsEventStatus*) (EventDispatcher.cpp:704, in XUL) Then, when synthesizeKey is called: ###!!! ABORT: can't send sync message of a lesser priority than what's being dispatched: file /builds/moz2/working/ipc/glue/MessageChannel.cpp, line 1825 As well as a lot of "unsafe CPOW usage" warnings.

Comment on attachment 8624470 [details] [diff] [review] Fix the three autoscroll tests Looks ok: https://treeherder.mozilla.org/#/jobs?repo=try&revision=630054a346f5

Comment on attachment 8624470 [details] [diff] [review] Fix the three autoscroll tests Review of attachment 8624470 [details] [diff] [review]: ----------------------------------------------------------------- ::: toolkit/content/tests/browser/browser_keyevents_during_autoscrolling.js @@ +89,2 @@ > > +//yield new Promise(r => {}); remove commented line

https://hg.mozilla.org/integration/mozilla-inbound/rev/958e4293006dff60f8cb703335be335e9fc52ab6 Bug 1131626, fix autoscroll tests to work in e10s, r=felipe