Basic fear is that it becomes yet another chromium spawn some ~5 years down the line. Recent dramas surrounding FF on Android and unasked-for UI changes in desktop surely didn't win FF any new users...But...I'm still clinging to it.
Still more than what's available on Chrome and Safari on mobile, so it always remained my browser of choice on a phone.
Also isn't there more telemetry on by default in nightly?
Mozilla uses Firefox telemetry to fix bugs, identify areas to optimize, and guide product decisions. How else can Mozilla know which devices or problems to prioritize?
I'm really waiting for this
Mozilla still does not allow non-store extensions on their new firefox. Until they're back I have to keep old Firefox around. ...which sucks.