Follow the Steps :
1)Go to Netcraft.
2)Go on the Anti-Phishing menu and choose the first option Anti-Phishing Extension.
3)Click on the Download the Netcraft Extension button.
4)Now choose the browser for which you want the extension to be installed.
Now the extension is installed in your browser and whenever a phishing page comes to you it will report that page as Risk.With the help of this extension you can know more about the site.