Every time I restart my PC and launch the Firefox it asks to install add-ons I installed earlier.

Hi, You should look at the article [http://kb.mozillazine.org/Preferences_not_saved Preferences not saved]. These should give you all the information you need! If that doesn't work: # Type about:config in the address bar # Click ''I'll be careful, I promise'' if prompted # In the Filter input field type ''startup'' # Double click on startup.homepage_override_url # Delete the text string and click ''OK'' # Close Firefox and reopen the window to verify that it has worked. Hopefully this helps!