Like to search and buy domain names? Then this is the add-on for you.
Domain Lookup allows you to highlight any text on any give Web page and see if that phrase or word is available as a domain name.
All you do is select the text, then right-click (or CTRL+SHIFT+D) and Domain Lookup will search several domain registrars for availability, either as a .com, .net, .org, etc. The add-on will automatically remove any spacing or other illegal characters from the text. There are currently 16 registrars supported, including 1&1, Moniker, Register.com and GoDaddy.