Comment 24 for bug 1921931

Not sure if it's quite the same bug, but I've noticed when running with `MOZ_ENABLE_WAYLAND` added to the `/usr/bin/firefox` script in ubuntu that clicking links from other apps works initially after firefox has started, but after some time of a running firefox window being open ends up with a "Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile." message dialog when clicking links from other apps.

Adding `MOZ_DBUS_REMOTE` in addition to `MOZ_ENABLE_WAYLAND` appears to fix this in somewhat limited testing so far.

downstream bug report: https://bugs.launchpad.net/firefox/+bug/1921931