Not to be confused with AdBlock. Adblock Plus (ABP) is an open-source content-filtering and ad blocking extension developed by Eyeo GmbH (Wladimir Palant), a German software developer.The extension has been released for Mozilla Firefox (including Firefox for mobile), Google Chrome, Internet Explorer, Opera, Safari, Yandex Browser and Android.dblock Plus for Google Chrome has been available since December 2010 and has over 10 million users. It has also become the most popular extension for Firefox, with around 18 million users as of March 2014. Adblock Plus was released as an app for Android devices in November 2012.