OS is Ubuntu Mate running on a Raspberry Pi. Firefox crashes on startup. It will not start in safe mode, crashes there as well. It is happening on 2 identical systems. I installed the Ubuntu mail package yesterday. I am guessing some part of that package is causing the problem. I don't want to uninstall it, because I need it for a project I am working on. Has anyone seen this and knows where the problem lies? I have tried reinstalling Firefox, but that does not fix the problem.