Firefox crashes or closes upon loading page in 2nd tab.

Question

Since upgrading to FF V10.0 I can't open certain pages and FF closes/crashes upon loading a new page in a second tab.
FF won't open at all while having 2 startpages, even in safe mode.
No crash report submitted. the last crash report was in V9.

Answer 1

Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
* https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.
If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
* http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
See:
* http://kb.mozillazine.org/Firefox_crashes
* https://support.mozilla.org/kb/Firefox+crashes
* https://support.mozilla.org/en-US/kb/latest-firefox-issues
If you have submitted Breakpad crash reports then post the IDs of one or more Breakpad crash reports (bp-xxxxxxxx-xxxxxxxxx-xxxx-xxxxxxxxxxxx). You can find the IDs of the submitted crash reports on the about:crashes page. You can open the about:crashes page via the location bar, like you open a website.
See:
* http://kb.mozillazine.org/Breakpad (Mozilla Crash Reporter)
* https://support.mozilla.org/kb/Mozilla+Crash+Reporter
* https://developer.mozilla.org/en/How_to_get_a_stacktrace_for_a_bug_report