I am on Firefox Nightly.
https://www.mozilla.org/en-US/firefox/channel/desktop/#nightly
Nightly is remarkably stable! And fast! Firefox has come a LONG WAY in the past few releases. It is a much, much better browser than it has been in YEARS.
I’ve been using Nightly for the past few years and have had very few crashes.
True: A lot of the old extensions no longer work. But I’m getting used to browser life without my old favorites. Overall, I am very pleased!
The SJW nonsense associated with Mozilla ownership doesn’t bother you?