Are there any significant security fixes between 12.14 and 12.16? I've been using 12.16 for ages now but annoyingly it crashes all the time. If rolling back would help, I think I will do so. If 12.x didn't crash so much and wasn't so slow at JavaScript compared to modern JS engines found in other browsers, I'd be content for some time to come.
Upgrading to a modern branch is not feasible for me. The new branches are still not usable from my perspective as I consider tab bar placement to be a critical requirement in my daily browser and will not switch until its return.