I've been trying to force Firefox (latest Firefox Developer Edition) upon myself yet again for the past week, and aside from performance problems which still se

I've been trying to force Firefox (latest Firefox Developer Edition) upon myself yet again for the past week, and aside from performance problems which still seem to exist on the Mac (initial rendering of pages is slow), some things just annoy the hell out of me: - Search results are not highlighted on the scroll bar, which means no information on grouping at a glance, and can't just scroll to the relevant part. I have to go through matches one by one. - Font rendering is subtly broken as always. A specific example is font-variant-numeric: tabular-nums, which seems completely broken at least for -apple-system (.SF NS Text); as a result a data aggregation site of mine which I read all the time looks awful, larger numbers may be narrower and vice versa. (Oddly, font-variant-numeric: tabular-nums seems to work for "Fira Sans" on MDN; I haven't found another font it works on.) - With developer tools open, pages are really slow. I'm probably forgetting something else. (I should add that I also forced Safari upon myself, which is a shitshow, problems too numerous to list. Until Google completely removes ad-blocking capabilities I need, Chrome is simply the best there is.)