Bug#968190: gnome-terminal is not listed by firefox when it wants to share a screen

[Simon McVittie]

On Mon, 10 Aug 2020 at 11:20:33 +0000, Marcin Szamotulski wrote:
>    Trying to share a gnome-terminal window in firefox (firefox-79.0, but
>    also in previous versions of firefox).

If you're in the default (Wayland) GNOME session, gnome-terminal doesn't
have any X11 windows. I suspect Firefox can only share X11 windows.

Please try this workaround (this assumes you are using gdm, other display
managers will probably have a similar flow):

- save documents, etc.
- log out
- choose/enter your username
- before typing your password, click the gear-wheel icon and select
  session type "GNOME on Xorg"
- finish logging back in

If that is successful, then my guess about the cause was probably correct.

The long-term solution to window and desktop sharing in GNOME Wayland
sessions is to use Pipewire, but the version of Pipewire currently in
Debian is too old (#954022) and Firefox doesn't support it yet anyway
(https://bugzilla.mozilla.org/show_bug.cgi?id=1430775).

    smcv