Ubuntu crashing when I open Firefox

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http://askubuntu.com – It's a fresh install. I installed proprietary drivers for my GTX 670, but it screwed up the resolution, so I reverted back to the open-source drivers. I then got a lot of messages saying an internal error had occurred and to send the report. Now when I open Firefox it crashes Ubuntu 12.10 to a black screen for a couple seconds, then puts me back at the login screen. The black screen says * Stopping save kernel messages * Starting CUPS printing spooler/server * Checking battery state... * Stopping System V runlevel compatibility * Starting I am unsure what is happening. I reinstalled (HowTos)