Uninstalled FF and reinstalled, that worked. Interestingly I do not have this issue on my dualboot Ubuntu FF.

I did purge my cache on Ublock, not working for me.

I’m getting the pop-up, which I can click to close and watch videos on my FF + Ublock.

Use Revanced on phone. Works like a charm.

Me : clicks a helpful tutorial of 5 minutes. YT: here have an unskippable ad 5 seconds. Me: annoying but the creators have to make money somehow I guess. YT: and now here’s your skippable ad. Me: I just want this to be over with. YT content creator: Hello guys this video is sponsored by Raycons. 10 seconds blabbering on the product, skip skip Me: closes video.