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.
Tbh I didn’t mean to Lemmy, so much as simply off Twitter in general, preferably to a non-corporate social site. It may be naive/idealistic, but I think those most inclined to leave would be the better of the bunch, and those in-between are more apt to go to another corporate site anyway (e.g. Threads).