Same, very rarely "disappointed" with FF outside of the core browser (like the days when Chrome could point to how much RAM older FF was stuck using before Chrome became worse). Still used it as default on desktop and laptop since like 03~04, and completely switched on Android when they started allowing limited extensions (and now can basically force almost all).

The sites themselves are what I actually feel extremely disappointed about. Back when I did randomly buy/stream songs/albums from Amazon it would work. But now they pretend to work and then act like my browser "is out of date" (even link the FF site knowing there isn't an update and pulls the old IE tactic of really pushing "better with Chrome" or whatever). I don't use the Netflix site, but know that they have intentionally dark patterned using it on FF with fake limits on being 720p, and very much can run 1080p with third-party extensions likely spoofing Chrome/Chromium coded DRM (I am guessing that is what is being done at least).