I can not figure out why this happens. I tried to play around with all the permissions, reset printer settings on Firefox, created new profiles, all had the same problem. But when I used those same profiles on the apt installation it printed just fine. Is there some weird Flatpak sandboxing happening because I can print fine from the Ungoogled Chromium Flatpak but not Firefox Flatpak.
can you launch it from the command line and see if it spits out any useful info before the crash?
I will try that once I am back home
At launch it says
Failed to load module "xapp-gtk3-module"
/home/MyUsername/.mozilla/firefox/htzenoyk.Default User/user.js:1: prefs parse error: unexpected character
ATTENTION: default value of option mesa_glthread overridden by environment.
ATTENTION: default value of option mesa_glthread overridden by environment.
When I go to print and it crashes it says
ExceptionHandler::GenerateDump cloned child 797
ExceptionHandler::SendContinueSignalToChild sent continue signal to child
ExceptionHandler::WaitForContinueSignal waiting for continue signal...