FWIW nothing at Troubleshooting Firefox helped.
For those interested, I opened a bug report at bugzilla. You can find it here.
I found that this was caused by having
GTK_USE_PORTAL=1 set in my environment, which I had done to allow Firefox to use native KDE file dialogs. Apparently a Thunderbird update introduced code that causes this to make it crash on launch. See https://bugzilla.mozilla.org/show_bug.cgi?id=1514605
GTK_USE_PORTAL and seeing if that helps!
Wow I never would have thought of it! Unfortunately I already reinstalled Manjaro since this issue was driving me mad, but thank you nonetheless.
Yeah this was basically user error.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.