I find the notification permission change (requiring it to be after a user gesture) really annoying. It doesn't do almost anything to combat permission spam (if you're visiting a clickbait site, you'll probably click or scroll at least once, especially on mobile where sites usually have a giant header so you need to scroll past the fold to even see that the article is clickbait), and just inconveniences developers who have to special-case Firefox's divergence from the spec when trying to legitimately use the gated features.