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Not to be confused with Adblock Plus.
Adblock logo & wordmark.png
Original author(s) Michael Gundlach
Developer(s) BetaFish Incorporated
Initial release December 8, 2009 (2009-12-08)
Stable release 2.15 / December 9, 2014; 8 days ago (2014-12-09)
Development status In development
Written in Javascript
Operating system Cross-platform
Available in Bahasa Indonesia, Deutsch, English, Français, Nederlands, Türkçe, català, dansk, español, hrvatski, italiano, latviešu, magyar, polski, português (Brasil), português (Portugal), română, slovenský, slovenščina, Suomi, Svenska, čeština, Ελληνικά, Српски, български, русский, українська, עברית, తెలుగు, ‫العربية, 中文 (简体), 中文 (繁體), 日本語, 한국어
Type Browser extension
License GPLv3

AdBlock is a content filtering and ad blocking pay what you want extension for the Google Chrome, Apple Safari, Mozilla Firefox, and Opera web browsers.[1][2][3][4] AdBlock allows users to prevent page elements, such as advertisements, from being displayed. As of July 2014, AdBlock is the most popular Google Chrome extension, with over 40,000,000 users,[5][6] and the most popular Safari extension.[7] According to an article in The New York Times,[8] the extension was created on December 8, 2009 (the day that support for extensions was added to Google Chrome). Safari support was added in June 2010.

AdBlock is not to be confused with Adblock Plus. The creator of AdBlock claims to have been inspired by the Adblock Plus extension for Firefox, but otherwise the two efforts are unrelated (as well as to the original Adblock from which Adblock Plus was forked).[9]

Version history[edit]

Version 2.0 introduced true blocking of resources in Google Chrome, which means that most resources can be blocked before they are even downloaded.

Version 2.1 added internationalization. Currently, AdBlock supports over 34 languages.

Version 2.3 added a toolbar button, therefore the separate extension "Browser Button For AdBlock" was retired.

Version 2.4 saw many speed improvements—reportedly, the extension is twice as fast, while loading less memory per tab.[10]

As of Version 2.5, the add-on blocks the download of all advertising resources, including ads in videos and in Flash.

Version 2.6 lets the user see how many ads have been blocked by AdBlock on the page and overall.[11] From version 2.6.20, it began sending a request to, with whom BetaFish had partnered, and advertised their services to selected users. It also whitelisted ads, but just for selected users from survey.[12]

Version 2.7 began sending user locale and introduced a brand new design. Version 2.7.4 made the changelog available in the extension.

Version 2.8, a new tab directing to opens after installation of AdBlock Beta, which lists most important changes in extension.

Version 2.9 added a feature to allow users to synchronize their settings/filter lists/custom filters using Dropbox.

Version 2.10 replaced AdBlock's menu with ported popover on Safari.

As of Version 2.11, in the 'Report an Ad' feature, the extension will perform a check for known malware domains in the list of resources. If resources from a known malware site are found, the users is notified, and the a link with more information is provided.

Version 2.12 was a maintenance release - it didn't offer any new features but many bugs were fixed.


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.


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.[13]

See also[edit]

  • IE7Pro (for Microsoft Internet Explorer)