I'm on nightly and haven't noticed anything. How do you differentiate between crashed and GC-ed?

I am on LTS.

When it pops up two (count 'em, 2) dialog boxes announcing it has crashed and would you like to have it re-started, that seems pretty unambiguous. It happens about every day, lately, often when I click the "new tab" button.

What? Android FF is superstable for me.

fwiw I can reproduce the problems with Firefox Android, the latest major update broke heaps of shit.

To be very precise, I use the Fennec build off of F-droid, so it may be trailing FF from the Play-store a bit. Sounds like an incident, not deteriorating quality in any case. I'm happy as a clam with FF/Fennec.

The last major redesign broke/removed "Undo Close Tab", with a promise to bring it back. I found that decision to be staggering. It's not even clear what purpose the update served, except as an example of the development approach that jwz assigned the epithet of "CADT" 15+ years ago.

I use Fennec from F-Droid as well. The redesign broke many features for me and rendered it near unusable (or actually unusable for certain tasks, like downloading files).