hi alantanmc, you can go to the firefox menu ≡ > help ? > about firefox - you should get an update to 41.0.1 there, which we hope will fix this issue!

Separate Issue; Your System Details shows;

Installed Plug-ins

Adobe PDF Plug-In For Firefox and Netscape 11.0.9 Adobe PDF Plug-In For Firefox and Netscape 11.0.12

Garmin Communicator Plug-In 4.2.0.0 Garmin Communicator Plug-In 4.2.0.0 BETA
Having more than one version of a program may cause issues. You must remove the older programs. Then get the current full installer.

Adobe PDF Plug-In For Firefox and Netscape: Adobe Reader Version 2015.008.20082 Note: McAfee Security is offered in the download.

Please update to the most recent version of Firefox:

• Update Firefox to the latest release

It looks like the attached bug has been fixed in a patch update today.

However if it still continues to crash please provide the crash ids from the about:crashes page in your response.