When Avast updated, it made a extension for my browsers. Ever since I updated it, Firefox has been crashing when viewing Youtube videos(iffy on some flash content sites). I think the problem might be this extension, but I can't seem to uninstall it. I see it on the extensions list, but everything is grayed out. I can't go to options, enable, or uninstall. It isn't compatible with my version of Firefox. The fear is that the extension isn't the problem, but I just want to be sure by axing this extension. I was able to get rid of it on Chrome. We settings or fix do I have to do to get rid of this?