[yAnonymous]

I don't even know how it's possible that the performance degrades over time as it does, but it has become bad, at least on Linux.

Opening the dev tools has such a huge performance impact these days (on an i7 with 16GB RAM and an SSD...) that I mostly don't bother to develop with Firefox anymore.

Let alone missing features like user agent spoofing, which still requires an addon, or the bug that messes up file associations with every update.

I hope they do less UI changes, get their shit together and improve the core.