Me too. I'll report back within a few days.
> A better start point likely to produce more interesting/orientating info might be to run Firefox inside eg an openbox session, making absolutely sure no compositors are running (including xcompmgr etc). If you still get crashes in that type of scenario something's very broken.
I can look into this, too. And I'll provide virt-viewer logs but they haven't been helpful. I'll see what the other virt-related logs are saying.
> It I were serious about fixing this my first step would be building everything from source, one component at a time, verifying the issue is still present at each step; then, if everything's still crashing, pulling out good ol' printf
This was the advice given to me before from someone involved in the virt stack, and I started to do this but it turned into a lot of work just familiarizing myself with some things and I got sidetracked and eventually shelved it and just hoped it would eventually piss someone else off enough.