ok so whenever i try to go on google it says this

Unable to connect







Firefox can't establish a connection to the server at [ Register or Signin to view external links. ] .





The site could be temporarily unavailable or too busy. Try again in a few
moments.
If you are unable to load any pages, check your computer's network
connection.
If your computer or network is protected by a firewall or proxy, make sure
that Firefox is permitted to access the Web.






and its the same for runescape and i was wondering how i could fix this...