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.
I disabled my adblock for Twitter to see a update about game server maintenance. It showed me random posts, nothing from this year. Literally unusable site when you can’t even see the latest tweets. Had to have other people tell me maintenance was extended…