See: *http://kb.mozillazine.org/Browser_will_not_start_up ---- A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program. Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process. See: *https://support.mozilla.com/kb/Server+not+found *https://support.mozilla.com/kb/Firewalls ---- Essaye de supprimer toutes les règles pour Firefox dans le pare-feu.<br /> Si le pare-feu demande l'autorisation la prochaine fois, donne accès complet à Firefox.<br /> Vérifie les paramètres de ton pare-feu pour autoriser firefox.exe et plugin-container.exe.<br /> Il faudra donc redonner les autorisations dans le pare-feu.<br />