In every single thread it's the same stuff rehashed over and over, and dramatic takes about absolutely trivial changes or people being mad over Mozilla political stuff like them canning a former CEO (which was totally deserved). Very rarely do I ever see a positive comment or thread title, and most of the problems people bring up are basically non-issues for 99% of users or completely made up. There are of course some legitimate issues here and there, but they are the exception.
Every time I open these threads it's pretty confusing, I don't know if I am living in a different reality or what's up. I have had zero issues with Firefox in any way and have no complaints about the direction it's moving in. It has the best Wayland support, has great performance, now isolates each site in an OS level process (which further improves performance on modern machines), gets rapid security updates and builds in 1/4th the time and space that chromium takes. I don't notice anything missing compared to using chromium either.
Them removing Yandex from the default search engine options is barely news worthy. Users who want to use it still can, users who don't will continue not to, there is no real issue here.