I am having the same problem on my RPi and on my LG G3 running alarm in chroot with Linux Deploy. I have tried reinstalling several times, with no change in outcome. If I delete ~/.mozilla, firefox will start up, ask if I want to import settings from chromium (also installed on both devices), and then open up a window with 3 tabs - the default pages from Mozilla. They will load, but within a few seconds, the window closes with a seg fault error on the command line. If I try to restart, the crash is instant until I again delete ~/.mozilla.
I have tried to find an earlier package to install, but I can't find an archive for arm packages like I use for my x86 arch installs.
I may have an earlier version in my cache on the Rpi, but I haven't checked that yet. Hoping to figure out the problem with the current release in any case.
Hoping for some help troubleshooting and solving.