Je sens que ça va être utile...

• Load about:config in the browser's address bar.
• Confirm that you will be careful.
• Search for the following preferences and set them all to FALSE
  • browser.urlbar.openViewOnFocus
  • browser.urlbar.update1
  • browser.urlbar.update1.interventions
  • browser.urlbar.update1.searchTips
  • browser.urlbar.update1.view.stripHttps
• Restart the Firefox web browser.