Read here what kind of intrusion has happened. Chrome should keep such abuse at bay!
http://blog.elevenpaths.com/2015/04/fake-adblocks-in-chrome-web-store-leads.html
Fake Adguard code in backgroind js.file :
To check extensions: chrome-extension://lkakdehcmmnojcdalpkfgmhphnicaonm/options.html#
polonus