Can be used to analyze the page you are visiting with your browser, without going through the form at http://www.ranks.nl/tools/spider.html
Please note you need to be logged in as (paid) Ranks Friend for this Add on to work.
The Ranks NL icon will appear in your statusbar after installing. Click this icon to analyze the page you are viewing. This Firefox add-on will also add a link to your context menu.
If you like you can also add a button to your main toolbar.
See http://www.ranks.nl/friends/firefox for more details.