Score:2

Firefox 91 "invisible" to screen sharing (Google Meet, Zoom, Slack etc)

us flag

I'm on Ubuntu 21.04 and ever since Firefox 91 came out, I've lost the ability to share a Firefox window on all screen sharing applications.

  • The Firefox window simply isn't listed in the set of available windows to share, and
  • If I try sharing the entire screen then the Firefox window either appears completely black (Meet, Slack), or initially appears as a background on Zoom with the caveat that as soon as you click on it then it hides itself immediately.

I've tried following the common advice about Ctrl+i and changing permissions of "Share The Screen" away from "block", but it doesn't make any difference.

I get that Firefox has tried to beef up security in 91, but this is just crazy...

I have colleagues using Windows & Firefox 91 who don't seem to report the same problem and so this might be an Ubuntu-only issue.

Short of abandoning Firefox completely, is there a way to allow Firefox to be shared?

us flag
Are you using Wayland Session? Can you logout and choose the X.Org session and check if this issue persists there?
vanadium avatar
cn flag
@ArchismanPanigrahi You probably hit the nail: 21.04 indeed puts you on Wayland, even when upgrading.
Fixspec avatar
us flag
Logging out and switching to xorg (using the cog icon in the bottom right corner) indeed solved the problem. Thanks!
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