Hi all, since upgrading to Version 29(.0.1) I have lots of trouble starting firefox. Today it crashes with the crash reports below. I have to following crash IDs: bp-c91af26c-d657-45c2-9741-c4da32140513 bp-44dbdbd7-a69e-42ab-9050-aeb502140513 bp-244df326-8d3e-438f-b35d-f7eaf2140513 bp-5b76894b-9fce-46d4-bf86-35e2c2140513 bp-81430263-e064-4795-aeb1-a3b5f2140513 bp-095a28d1-9c34-4238-bf2f-0aaaf2140513 Some of these crashes also happened after removing the profiles folder and profile.ini file. A profile was created again, but firefox does not start up anyway. I also tried safemode without a profile. Some more history: I've tried to upgrade from v26 to 29 about a week ago, but that did not work either: after upgrading to v29 firefox did not start, it didn't even show up the crash reporter. (I reinstalled v26 without uninstalling firefox, and it worked again). The following steps lead to have a working v29 yesterday: # Uninstalling v26 including the user data # manually removing my profile (!) although it should have been removed in the first step # manually removing the program files under C:\Program Files (x86)\Mozilla Firefox # reboot # installing firefox 29.0.1 (not the stub but the full version) This version was working the whole day, I also reinstalled some plugins, restarted the browser and everything was fine. After that, some Windows updates where installed: KB2964358, KB2952664. Today, the crashes above happen. Thanks for help!