Works fine as long as you dont sign in
I am signed in on all my devices and it was working fine on my 6S+ until tonight (7/27/16) then it crashed and no matter what I do, I cant get it to work anymore.....it keeps crashing to the home screen. The only way I can use the app now is if I delete and reinstall and DONT sign in. If I sign in, CRASH. I tried opening Firefox on my other devices (5S) and they immediately crashed as well. I love Firefox but I wont be using this app until they fix it because its useless to me without my bookmarks. Ill update rating if/when its fixed.
***UPDATE***
New version 5.1 released today (8/25/16) DOES NOT fix the crash to home screen issue while signed in.
Phatkat13 about
Firefox: Private, Safe Browser, v5.1