I won't be happy if it were to fail but certainly I won't despair either. I don't want amazing performance improvements at the cost of huge functionality losses

I won't be happy if it were to fail but certainly I won't despair either. I don't want amazing performance improvements at the cost of huge functionality losses. This update is simple a regression: almost every add-on I have been using will stop working and has a stupidly limited or no replacement at all. There will really be no reason for me to still use Firefox over any other browser now. The only option seems to switch to the ESR version, at least for a while it will work.