I've just tested 21.10 and can reproduce the bug in Firefox there. It appears the cause is Firefox version 93 in Ubuntu 21.10, whereas Ubuntu 22.04 has Firefox 94. So here's how to fix it in Ubuntu 21.10:
snap remove firefox snap install firefox --candidate Chrome/Chromium will need a different fix but it doesn't even officially enable Wayland support yet. ** Changed in: xdg-desktop-portal (Ubuntu) Status: New => Invalid ** Also affects: firefox (Ubuntu) Importance: Undecided Status: New ** Changed in: firefox (Ubuntu) Status: New => Fix Released ** Also affects: chromium-browser (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1950040 Title: Wayland Screensharing broken in Ubuntu 21.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1950040/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs