How to install seo Quake

SEO Quake is a Add Ons that can be installed in the browser Mozilla Firefox (but already can on the internet explorer and google chrome too lho ..) whose function is to display a web page SEO parameters. The parameters that we can see, among others, Pagerank, Alexa rank, Google index page, google backlinks, whois, index etc. Delicious. With a facility like this of course will greatly assist