Several days ago, my Firefox started to crashing (with running Bustabit session) everyday, around 3-4 a.m. (UTC); has anybody similar experience, or it is more probably related just to my OS and environment ?

And the second question - This Bustabit (v2) is running smoothly just under Firefox, I tried Chrome, Chromium, Midori and PaleMoon, but it doesn't run there. Has anybody the same experience ? Thanks.