Download Firefox Systems and Languages Novetats Privacy Give Firefox a tune up Refresh Firefox How does it work? Download a fresh copy Troubleshooting Unblock Firefox from connecting to the Internet Tot All articles and threads Fix problems with websites (Facebook, YouTube, webmail etc.) Firefox is slow or stops working Firefox crashes Unblock Firefox from connecting to the Internet Firefox won't save settings or remember information Procedures to diagnose and fix problems Problems with add-ons, plugins or unwanted software Videos, sound, pictures and animations don't work Detecció de portal cautiu Pàgina que descriu com Firefox detecta les xarxes amb portal cautiu. In English How to troubleshoot time related errors on secure websites How to troubleshoot security error codes on secure websites Connection settings in Firefox What do the security warning codes mean? Firefox can't load websites but other browsers can How to let Firefox use the internet on your Windows computer Server Not Found - Troubleshoot connection problems How to resolve weak crypto error messages on Firefox