This is really weird. I'll have to check on a different distro. I'm currently on fedora and firefox was already installed.
- ctrl+T/C/V (new tab, copy, paste) work as expected and all other shortcuts including ctrl and alt work as well
- I've installed a keyd for switching alt+mod otherwise it's a pretty fresh install
- I started firefox in
--safe-modeand got the same behavior. But thanks helping me trouble shoot.