|Original author(s)||Michael Gundlach|
|Initial release||December 8, 2009|
Chrome, Safari, Opera:
2.19 / December 3, 2015
|Available in||51 languages|
AdBlock is a content filtering and ad blocking extension for the Google Chrome, Apple Safari (desktop and mobile), Opera and Microsoft Edge web browsers. AdBlock allows users to prevent page elements, such as advertisements, from being displayed. It is free to download and use, and it includes optional donations to the developers. The AdBlock extension was created on December 8, 2009, which is the day that support for extensions was added to Google Chrome.
AdBlock's efforts are not related to Adblock Plus The developer of AdBlock, Michael Gundlach, claims to have been inspired by the Adblock Plus extension for Firefox, which is itself based on the original Adblock that ceased development in 2004.
Gundlach launched a crowdfunding campaign on Crowdtilt in August 2013 in order to found an ad campaign to raise awareness of ad blocking and to rent a billboard at Times Square. After the one-month campaign, it raised $55,000.
Sales and acceptable ads
AdBlock was sold to an anonymous buyer in 2015 and on October 15, 2015 Gundlach's name was taken down from the site. In the terms of the deal, the original developer Michael Gundlach left operations to Adblock's continuing director, Gabriel Cubbage, and as of October 2, 2015, AdBlock began participating in the Acceptable Ads program. Acceptable Ads identifies "non-annoying" ads, which AdBlock shows by default. The intent is to allow non-invasive advertising, to either maintain support for websites that rely on advertising as a main source of revenue or for websites that have an agreement with the program.
AdBlock uses the same filter syntax as Adblock Plus for Firefox and natively supports Adblock Plus filter subscriptions. Filter subscriptions can be added from a list of recommendations in the "Filter Lists" tab of the AdBlock options page, or by clicking on an Adblock Plus auto-subscribe link.
AdBlock for Firefox
On September 13, 2014, the AdBlock team released a version for Firefox users, ported from the code for Google Chrome, released under the same free software license as the original. The extension was removed on April 2, 2015 by an administrator on Mozilla Add-ons.
The official site's knowledge base article on December 7, 2015 states that with version 44 or higher of Firefox desktop and Firefox Mobile, AdBlock will not be supported. The last version of Adblock for those platforms will work on older versions of Firefox.
On April 1, 2012 the developer tweaked the code to display LOLcats instead of simply blocking ads. Initially developed as a short-lived April Fool joke, the response was so positive that CatBlock is now an optional add-on supported by a monthly subscription.
On October 23, 2014 the developer decided to end official support for CatBlock, and made it open-source, under GPLv3 licensing, as the original extension.
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