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Firefox can't access any WEB Site and always present the same message "Firefox can’t establish connection with server SERVERNAME". However if I use IE or Google Chrome the web site is accessible . I've already uninstalled and installed FireFox .

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Firefox can't access any WEB Site and always present the same message "Firefox can’t establish connection with server SERVERNAME". However if I use IE or Google Chrome the web site is accessible . I've already uninstalled and installed Firefox but the problem doesn’t change.

Additional System Details

This happened

Every time Firefox opened

This started when...

It started a few days ago, but I've no idea why.

Application

  • User Agent:

More Information

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Informações básicas sobre o aplicativo
Nome
Firefox
Versão
3.6.12
Pasta do perfil
Abrir pasta
Plugins instalados
about:plugins
Configuração da compilação
about:buildconfig
Extensões
Nome
Versão
Ativo
ID
Skype extension for Firefox 4.2.0.5198 true {AB2CE124-6272-4b12-94A9-7303C7397BD1}
Java Console 6.0.17 true {CAFEEFAC-0016-0000-0017-ABCDEFFEDCBA}
Java Console 6.0.19 true {CAFEEFAC-0016-0000-0019-ABCDEFFEDCBA}
Java Console 6.0.20 true {CAFEEFAC-0016-0000-0020-ABCDEFFEDCBA}
Java Console 6.0.21 true {CAFEEFAC-0016-0000-0021-ABCDEFFEDCBA}
Firefox Synchronisation Extension 7.3.3.42 true {A27F3FEF-1113-4cfb-A032-8E12D7D8EE70}
Preferências modificadas
Nome
Valor
browser.places.smartBookmarksVersion 2
browser.startup.homepage_override.mstone rv:1.9.2.12
extensions.lastAppVersion 3.6.12
network.cookie.prefsMigrated true
privacy.sanitize.migrateFx3Prefs true
security.enable_ssl2 true
security.enable_tls false

cor-el
  • Top 10 Contributor
  • Moderator
10780 solutions 97024 answers

Did you check your security software (firewall)?

A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, 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.

See Server Not Found - Troubleshoot connection problems and Configure firewalls so that Firefox can access the Internet and http://kb.mozillazine.org/Firewalls

Question owner

After changing the security level of my firewall software, Firefox starts working again. Thanks. Après modifier le niveau de sécurité du Firewall, Firefox a marché bien. Je vous remercie. Após midificar o nível de seguraça do Firewall, o Firefox voltou a funcionar.