Hi, after the July 2017 Windows 10 update (KB4025342) users of Comodo security products may suffer from crashes shortly after they launch Firefox or other products. This is caused by an incompatibility of a component of Comodo's products hooking into the browser with the most recent Windows updates. Affected users could try one of the following mitigations in order to fix the crashes: # Uninstall their exisiting Comodo security product and install the most recent available versions containing a patch for this problem: https://forums.comodo.com/news-announcements-feedback-cis/comodo-internet-security-v10016254-released-t120010.0.html # Switch to the 64-bit version of Firefox, which is unaffected by this kind of crash: [[How to switch from 32-bit to 64-bit Firefox]]