Vomnibar 'Search through your open tabs' not jumping to tab in new window on Wayland Firefox

[madhermit]

Describe the bug When Firefox is started using MOZ_ENABELED_WAYLAND=1 firefox the Vomnibar 'Search through your open tabs' feature by hitting T does not jump to a tab in a different window (though it will jump to a tab in the current window). It behaves as expected when running MOZ_ENABELED_WAYLAND=0 firefox.

To Reproduce Steps to reproduce the behavior:

1. Install SwayWM (or some other Wayland WM)
2. Launch firefox with MOZ_ENABELED_WAYLAND=1 firefox
3. Open a a couple tabs
4. Open a new window and open a couple more tabs
5. Hit shift-t to launch the Vomnibar and type in the name of a tab in the other window
6. Witness its failure to switch windows

Browser and Vimium version Firefox 76 Linux 5.4.0-7626-generic (Ubuntu 20.04 LTS) Vimium 1.66

[gdh1995]

Confirmed on Firefox 76 + Fedora. The system just showed a short notification of " is ready".

Seems a bug of Wayland or Firefox's Wayland caller. Gnome Terminal also had such an issue: https://gitlab.gnome.org/GNOME/mutter/issues/523