Thank you for the links. When you submit reports, they are compiled and analyzed for trends and fed into the development process, but this forum is the right place for a personal review. Unfortunately, your crash reports were not linked with any already filed bugs that might illuminate the source of the problem. Can you think of any pattern (types of sites, types of activities), other than having used Firefox for 3-4 hours? ---- It does appear that you have two extensions, and you might try disabling those temporarily. Open the Add-ons page using either: * Ctrl+Shift+a * orange Firefox button (or Tools menu) > Add-ons In the left column, click Extensions. Then click the disable buttons for each. If a link appears above either disabled extension to restart Firefox, you can click that as the last step.