I have been using it for a few "years" now. It has exceeded my expectation for stability from a "nightly" product. I don't even remember having problems with it in last few years, and it's my primary browser.
I'm currently using FF 70 beta on the Aurora update channel on Linux and so I've had no complaints. Performance has been on par with Chrome/Chromium and a huge leap over the FF 6x releases, especially on Linux.
At the moment I only have one issue with FF. I can't use bookmarklets on pages like FB and Twitter, because of some wrong implementation of a content policiy or something like that...
My issue with FF is that it doesn't batch load the favicons after importing bookmarks from Chrome. The globe icon is fugly. The items in bookmarks are too closely spaced and look bad. It just looks like amateur hour.
Rock solid.
Can recommend few extensions
- https://addons.mozilla.org/en-US/firefox/addon/auto-tab-disc...
- http://www.one-tab.com
- https://addons.mozilla.org/en-GB/firefox/addon/multi-touch-z...