[cat199]

which distribution are you using?

I had serious stability problems on Fedora a few months ago which sounded just like yours - I've since switched to debian for other reasons (with same exact profile data) and things are fine, which made me suspect something in the runtime or build toolchain is different and triggered some subtle bug.

not to blame fedora specifically (and who knows if this was a 'me' problem); but distros do differ slightly esp. w/r/t kernel params/threading/builds etc.

Might be worth trying FF ESR or running in a different distro container to see if this helps (yes, not convenient, but..)

also possibly rebuild your profile (pretty sure I tried this.. but anyhow)