hi, unfortunately this crash may be caused by websense endpoint security software that is running on a device. in case your computer is part of a managed enterprise environment, please get in contact with your it department about this issue again. more information is available in bug 1181091. in a larger enterprise using the extended support release (esr) version of firefox, which receives security updates but feature updates only once every 10 months, might also be a better option compatibility-wise: https://www.mozilla.org/en-US/firefox/organizations/faq/