How to sec page rank of website

Page rank of any site can be seen by FireFox web browser.Google-toolbar-win is needed,which is a XPI file.Size of the file is 1137KB.Google-toolbar-win is available on FireFox site.After downloading the java script,just drag it on the FireFox browser.Then a Page rank toolbar will be seen on FireFox browser.Hold on catsuit of mouse on the page rank tool bar,then page rank of the site can be seen which is out of 10.