As an alternative, I’ve been using Waterfox.

FF’s performance on Meta sites in general is terrible. Slow loading at best, other times they don’t load at all. On my Macs, the FirefoxCP RDD process periodically gets into a state where FF stops responding to mouse clicks and has to be force quit. There’s an about:config setting to deal with that but it doesn’t work for me. Frankly, I don’t think cramming in some AI crap is going to fix any of this.