If you're a developer, use the developer edition, it's amazing. I'm too lazy to give you a feature-by-feature breakdown of what hasn't hit stable yet but... up until just recently "quantum" was one of them.
The news about FF getting faster is just hitting the mainstream now but developer edition has had it for months, and I haven't suffered any noticeable bleeding edge issues (mostly because I'm not on nightly). This might have to do with my update cadence with arch (firefox-developer is in the AUR) but I think more likely it's the distance from nightly.
Anecdotally I find it to be just the blind amount of "bleeding edge" (others described it well, behind nightly but ahead of stable), and I am now lost whenever I try to debug anything in chrome.
The news about FF getting faster is just hitting the mainstream now but developer edition has had it for months, and I haven't suffered any noticeable bleeding edge issues (mostly because I'm not on nightly). This might have to do with my update cadence with arch (firefox-developer is in the AUR) but I think more likely it's the distance from nightly.
Anecdotally I find it to be just the blind amount of "bleeding edge" (others described it well, behind nightly but ahead of stable), and I am now lost whenever I try to debug anything in chrome.