Great suggestions.
I’d strongly recommend Dearrow instead of Clickbait remover now (I used to use Clickbait).
It’s made by the same developer who made Sponsorblock, which I also strongly recommend (it skips over in-video sponsors, title sequences, non-music sections in music videos, etc.). Just remember to turn it off for channels whom you wish to support.
I think the most annoying thing here is the decision to blanket ban other browsers. Why not just have a little drop-down bar at the top that says ‘You may encounter issues, we recommend browsing this site with Google Chrome’, instead of completely blocking access? The cynic in me suspects it’s linked to advertising.
If one changes the user agent in Firefox so that it announces itself as Chrome, most of these sites work just fine. Adobe Express is the last example I tried.