We need to test correct voice selection in content mochitests. Currently, we do that with implementing a service via SpecialPowers. This doesn't work well with e10s tests, so it would be nice if there was a lightweight way of knowing what voice was ultimately chosen for a spoken utterance.

Comment on attachment 8602940 [details] [diff] [review] Add SpeechSynthesisUtterance.chosenVoiceURI for testing purposes. > } > >+ > nsresult Don't add that extra new line. Would [ChromeOnly] work for chosenVoiceURI? But Pref is fine too.

Made it ChromeOnly and removed newline. Carrying over r+

Comment on attachment 8603081 [details] [diff] [review] Add SpeechSynthesisUtterance.chosenVoiceURI for testing purposes. r=smaug I meant only ChromeOnly, not both ChromeOnly and Pref ;)

Good point! I'll change that before pushing.

Backed out in https://hg.mozilla.org/integration/mozilla-inbound/rev/05e4643b27ec for apparently causing the Gip(a) permafail on inbound: https://treeherder.mozilla.org/logviewer.html#?job_id=9712726&repo=mozilla-inbound

Looks like we were crashing when activating the screen reader with no available voices. We were dereferencing a null pointer. I'll move that line after the null-check and it should be good. Try is happy.