Comment 23 for bug 1921931

I recently switched from Nightly to Stable on my Arch Linux + Gnome on Wayland desktop.

I have both `MOZ_DBUS_REMOTE` and `MOZ_ENABLE_WAYLAND` enabled in my `.pam_environment`, both correctly shows up as enabled in `about:support` in the Environment listing, yet this fails to work still and I get a "Firefox is already running..." message whenever I try to launch any link from the OS. Even if I *start* Firefox by clicking a link from another app, if I click the same link again in the same app I get the same result. I'm using the [package](https://www.archlinux.org/packages/extra/x86_64/firefox/) version of latest stable Firefox (`81.0.1`).

The weirdest thing about this is not only did this work on Nightly, but if I launch Nightly now, let it set itself as default browser, this works perfectly well in Nightly - all links from the OS correctly open in the browser. So the issue seems to be in stable, somehow, but I'm running out of ideas how to troubleshoot this so any help would be greatly appreciated.

PS: I have two profiles, a nightly and a stable one, stable is set as a default profile and Stable Firefox correctly launches with that profile set, while Nightly uses the nightly profile.