When I open Firefox it loads my "Restore Session" tab, then about 5 sec later it starts hanging / "not responding", whether or not I've attempted to restore my windows. If I'm lucky, this'll go away in a couple of minutes, but if I at all try to open a webpage, it will hang on that page for longer than my patience allows (i.e., I just end up Force Quitting Firefox). The hanging occurs every single time I open Firefox. I am running Mac OS X 6.8, Model 7,1 Mid-2010, and this problem only started happening immediately after I installed new RAM (2GB -> 8GB). What I've tried: * Restarting my computer * Reinstalling Firefox to the latest version (40.0.3) * Entering Safe Mode (still crashes) * Checked that graphic drivers are up to date (they are) * Checked RAM for errors; after running memtest I receive no errors All other applications have been working fine since the RAM installation. I know this is probably a difficult problem to solve, especially since I have no Crash Report to offer (since I've been having to Force Quit every time and thus do not receive the dialog). Regardless, if anyone has any information that might solve this, it would be much appreciated — I don't want to switch browsers yet!