Hi Sergey, do you have two different Firefox shortcuts? Perhaps they are installed in different folders. Could you check: right-click the shortcut > Properties Windows should show the Shortcut tab and select the contents of the Target field. If you copy/paste that field somewhere you can read it better, you should be able to tell what folders the programs are installed in. For example: * "C:\Program Files\Mozilla Firefox\firefox.exe" * "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" * somewhere else Also, in most cases, there isn't any extra text after the firefox.exe part. Do you notice anything unusual there?