Is YouTube Sabotaging Firefox?
I'm not sure if it's just me but... I'm pretty sure YouTube is doing A/B testing for some of us who doesn't log into YouTube and is using Firefox (or Firefox-based). It happened to me today, or more specifically, few hours ago.

Left is Firefox, right is Microsoft Edge. Restriction mode is off on both browsers btw.
Funny thing is, I was watching this youtuber's video 12 hours ago on Firefox before I went to work. It was fine and dandy. And then I saw everything was "missing" when I came back from work.

Same thing here. Left is Firefox, right is Microsoft Edge.
Even Jacksepticeye has some videos "missing" when viewing on Firefox without logging in.
And then I decided to open up Microsoft Edge and search up the same youtubers without logging in, every "missing" videos are ..... there? Not surprising because Microsoft Edge is using Chromium engine after all.
I dislike whenever YouTube (or was it Google) decides to mess with people that uses Firefox-based browsers. One way to solve those "missing" videos in Firefox is to log in. Can I not log in on some days and still enjoy YouTube videos on Firefox, Google? lmao.