User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36

Steps to reproduce:

A cronjob kicks off a script that contains a firefox call. This worked just fine prior to the snap version on Ububtu 22.04.1LTS

DISPLAY=${display} firefox --new-window ${HOME}/MESSAGE.html

Now, the first instance works and all subsequent instances fail when the first is still up. Failure says:
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.

Tried changing from --new-window to --new-instance, --new-tab, --private-window and they all error out.
Mozilla/5.0 (X11; Linux x86_64; rv:103.0) Gecko/20100101 Firefox/103.0

Actual results:

First instance works as expected and all other instances error out.

Expected results:

Several Firefox instances should pop up.

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Gtk' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

What about DISPLAY=... snap run firefox --new-window [...] ? Though you might then hit bug 1800350

Redirect a needinfo that is pending on an inactive user to the triage owner.
:stransky, since the bug has recent activity, could you have a look please?

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This is working, the original report was mentionning opening a file from CLI which is bug 1800350