So are their Addon or adblocker installed? And what A/v are you using? And what was the last working FF version before this started happening.

If you have submitted crash reports then please post the IDs of one or more recent crash reports that start with "bp-". *bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx You can find the report ID of recent crash reports "on the "Help -> Troubleshooting Information" (about:support) page". *click the "All Crash Reports" button on this page to open the <b>about:crashes</b> page and see all crash reports. Alternatively you can open about:crashes via the location/address bar. If a line on the about:crashes page doesn't start with "bp-" then click the line to submit the report and the link will be updated and gets a "bp-" prefix if the report is submitted successfully. *please do not add the "bp-" prefix yourself See also: *https://support.mozilla.org/en-US/kb/Mozilla+Crash+Reporter If you can't start Firefox, see: *http://kb.mozillazine.org/Mozilla_Crash_Reporter#Location_of_crash_reports *http://kb.mozillazine.org/Mozilla_Crash_Reporter#Viewing_crash_reports *https://developer.mozilla.org/How_to_get_a_stacktrace_for_a_bug_report

restarted my computer and firefox opened...hopefully the issue is resolved!