Your crash is caused by Digital Guardian. Either remove it or update it to the latest version. If you are in a organization with their own IT department, please contact your IT department and ask them to contact Verdasys for the workaround. For reference, here's a bug report that discusses the crash and communication between Mozilla and Verdasys *https://bugzilla.mozilla.org/show_bug.cgi?id=1010493 It might be worth noting that I suggest you switch over to the ESR version of Firefox used by large businesses and organizations as using release Firefox won't work. From the bug report: <i>The conflict between Verdasys Digital Guardian and Firefox is due to Digital Guardian only supporting ESR versions of Firefox. If you run into a problem with Firefox and Verdasys Digital Guardian please have your organizations Digital Guardian Support contact open a support incident with Verdasys Support for more information on suggested work arounds.</i>