Mozilla Firefox is the best web browser as it provides its users an easy to use interface and many plugins and add-ons for safer browsing. Although Firefox is already a secure browser but some websites may spread malicious data while browsing. To get rid of such scripts here are best privacy and security add-ons for Firefox.
Torbutton : Torbutton provides a button to securely and easily enable or disable the browser’s use of Tor. It is currently the only addon that will safely manage your Tor browsing to prevent IP address leakage, cookie leakage, and general privacy attacks.