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.
As another poster said, we used words like pr0n, and one that I personally have never used either of that replaces the “er” ending of a word with “a.”
Hell, half of the time we used l33tsp33k was to avoid using specific words.
This is not a new thing.