An extension for Chrome that will help you improve your focus on studies or work by blocking selected websites that distract you.
https://www.adobe.com/
http://getadblock.com/
http://adblockplus.org/
https://remotedesktop.google.com/
zoom.us
google.com
Avira
Avira
https://www.pinterest.com/
https://1password.com/
https://drive.google.com
https://google.com
