My problem was that CloudFlare refused to validate me when I have it enabled. I could have stock FF UA, but if my user agent switcher addon isn't disabled then I didn't get to use Crunchyroll and a few other sporadic sites.
I haven't been able to use a cloudfare website for a while now. If they're going to make me go through hoops because I refuse to use chrome, fuck it, they don't get my business.
FF works with CloudFlare sites, just not with that extension enabled. It doesn't make sense that they'd purposely block sites if you have a UA switcher that isn't even changing the UA so I'm hoping it's a bug that will get fixed
it depends on how much anti-fingerprinting you've setup. I only get endless captchas from every site and ended up just using an extension that blocks all crimeflare sites and redirects to an archive.org version of the page.
I have a setting somewhere that pisses off cloudflare then. It doesn't matter what I do with FF, it just keeps making me click the checkmark over and over.
That was my experience as well until I read a comment on Reddit that disabling the UA switcher addon in Firefox's settings fixes it. It's really annoying having to enable it every time I want to pretend to use Chrome but at least I can watch anime again.