Page Rank and Alexa Rank are two popular ranking systems available to check the popularity,authority etc. of any site on the internet. Now you can check Page Rank and Alexa Rank on your chrome browser by simply installing a chrome plugin.
Webmasters put advertisements in their sites to earn revenue from them, but such ads always annoy users. There is a trick to block such weird ads on Google Chrome and it can be done by using privoxy.org