Since Firefox 57 there is no way to disable Ctrl+Q shortcut by plugin on Linux (see this bug). All workarounds I've found are based on setting the global Ctrl+Q shortcut to "steal" it from Firefox. But this will disable this shortcut in every application, and I want to disable this shortcut only in Firefox, without affecting any other app.
Is there a way to disable or catch shortcut only for one application? I'm using Ubuntu with Unity.
Best Answer
In
about:config
set preferences.Firefox >= 87
https://bugzilla.mozilla.org/show_bug.cgi?id=52821
Firefox >= 65
Source
Older Firefox
Tested in all version I've come across 61.0.2-64.0.2 on 64bit Linux (and the 60esr channel on Win10).