It will not let me open websites, it stays on the new blank tab. It's slow. It always crashes.
I have a mac. At first the browser was really slow and the spinning circle would not go away. I forced quit. When I opened the browser most of my tabs with sites came back except a few although when I clicked on them the showed the web address that was there. So I closed them and tried re-typing and the address but it would not connect, it just stayed on the new blank tab. Firefox has been really slow over the past few months and it keeps crashing.
Please provide a crash id or stacktrace -> https://developer.mozilla.org/en/How_to_get_a_stacktrace_for_a_bug_report
Does the issue still occur if you start Firefox in Safe Mode? http://support.mozilla.com/en-US/kb/Safe+Mode
How about with a new, empty profile? http://support.mozilla.com/en-US/kb/Basic%20Troubleshooting#w_8-make-a-new-profile