I use Firefox as my default browser and it's fine. But, if I've not been using my iPhone for a while and I open Firefox, it starts loading the last page I was on, then crashes to a black screen with apple logo. This lasts about 30 seconds, than I'm back to my iPhone login screen. I can sometimes get out of this by hitting the tabs button, but not always. I'm currently stuck in a cycle which I can't interrupt, and Firefox is unusable until I reinstall it. I've tried restarting and resetting my phone, but reinstalling seems to be the only cure.

Any help on this? Thanks.