User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:70.0) Gecko/20100101 Firefox/70.0

Steps to reproduce:

I enabled WebRender by setting gfx.webrender.enabled and gfx.webrender.all to true, and then received a video call from someone on Facebook Messenger (messenger.com). After it did not work I attempted to call them too, yet it did not work until I set those booleans to false and restarted Firefox.

Actual results:

Instead of being presented with a video, only the grey background was visible. No audio either.

Expected results:

The video should have shown and audio should have played.

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Do you think this is a regression or has it always been broken?

I just tried on Ubuntu 18.04 + X11 + latest 73 nightly and it worked. Could you please try on nightly and report? WebRender isn't enabled by default on Linux in release / 70. If it is still broken, please supply your about:support. Thanks!

Okay, just tested again with 70.0.1 both with and without WebRender enabled — and it worked. Rather odd considering that I've had this issue happen prior to this, but it seems I might have been unlucky.