This issue has been previously reported by me here: http://community.norton.com/t5/Norton-360-Norton-Internet/Norton-Safe-Web-crashes-Firefox/td-p/1016251
Frequently when I click on site safety rating on the Norton Toolbar or I point to the site safety rating on a search engine, Firefox crashes.
Latest crash report log: https://crash-stats.mozilla.com/report/index/10b136d2-43c5-4efc-a0fa-89dca2131013
It mentions Symantec files as Crashing Threads:
- SymHTML.dll
- coUICtlr.dll
- coWPPlg.dll
- coFFPl24.dll
This is with Firefox 24 and NIS 21.1.0.18 RTM, not beta.
Norton Toolbar - 2014.6.0.27
Norton Vulnerability Protection - 12.0.1.3 - 1