Firefox’s Enhanced Tracking Protection (Strict Mode) is known to cause issues on x.com
There were no “issues”; everything was working completely fine. This is a deliberate decision to force people to turn off tracking protection.
I saw a recommendation to use Firefox’s container extension https://support.mozilla.org/en-US/kb/containers, but it’s disabled in private browsing windows, and I always use private browsing windows.
Not the person you’re asking but I’m part of the porn community on Twitter and that doesn’t exist anywhere else. Do I need it? No. Do I want to still be part of it? Yes. That’s why I’m not leaving. That part of twitter has remained more or less unaffected by the changes people complain about it. I haven’t noticed a surge of right wing/nazi porn.