I couldn't browse before but this really help me, and was so simple
Originally Posted by handy
If you can't access the web through Firefox, though you know you have an internet connection via your modem/router try the following:
Enter about:config in Firefox's address field.
Enter ipv6 in the new Filter: field.
Double click on the line left in the display window to change it's boolean value to true.
& that should be that...