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.