Hi!
> * Test with a standard (non-Hardened) kernel, and with linux-lts.
Doesn't matter.
> * Uninstall and reinstall Firefox and check there's no filesystem
> corruption.kayah wieniawa
Still doesn't work.
> * Test with Beta, Developer and Nightly versions, from the repos and
> direct from Mozilla.
Nightly build seems working fine.
> * Test using a live installer environment ("Live CD") which has Firefox
> 62 available.
> * Test your RAM.
RAM has passed memtest.
> * Check your temperatures and clean out your machine.
Seems to be okay.
--
Cheers,
Hubert Hauser.
