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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

Chrome, Safari, Opera:
2.24 / April 8, 2015; 38 days ago (2015-04-08)

2.0 / November 11, 2014; 6 months ago (2014-11-11)
Preview release

Chrome, Safari, Opera:
2.19 / March 11, 2015; 2 months ago (2015-03-11)

2.0 / November 11, 2014; 6 months ago (2014-11-11)
Development status In development
Written in Javascript
Available in ગુજરાતી (Gujarati), 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 [1]
Type Browser extension
License GPLv3

AdBlock is a content filtering and ad blocking 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 (and mainly) advertisements, from being displayed. It is free to download and use, but users can donate any amount they want to the developers. 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][10]

Version history[edit]

This list of versions only shows notable version changes. AdBlock maintain their own changelog, which can be found in their source code[11] and on their options page inside the extension.

Discontinued Stable Channel (Chrome, Safari, Opera) Beta Channel (Chrome)

If no beta channel version is specified, it is the same as the stable channel.

Version number Date released Summary of changes
1.3.11 3 Feb 2010 Added ad blocking of YouTube ads (but no other video ads)
1.4 5 Apr 2010 Improved the code used for filtering out ads
1.4.30 10 Jun 2010 The Safari version was released, using the same code base, at this release
2.0 16 Jun 2010 Rather than just hiding ads, AdBlock began to not download them, by using a new feature of Chrome v6
2.0.2 16 Jun 2010 Added EasyPrivacy (a filter list that blocks tracking scripts) to the list of recommended lists in the AdBlock options
2.0.4 17 Jun 2010 Added support of the "abp:subscribe" URL syntax that allows websites to let users click on a link to subscribe to a filter list. This only worked in Chrome at the time
2.0.7 18 Jun 2010 Added a wizard to check causes of ads showing when users report an ad to the AdBlock team
2.0.12 23 Jul 2010 When a user is manually blocking an ad, the on-screen popup helping them to do it shows them exactly what gets blocked, by updating the page in real time
2.0.15 24 Jul 2010 To help ease load on the servers that host the filter lists, AdBlock added support for expiration dates in the list code
2.0.22 16 Aug 2010 Fixed issues with blocking ads in Safari, and improved memory usage on both Chrome and Safari
2.1 29 Aug 2010 Added support for multiple languages. Only Dutch and German translations of the original English were available
2.1.5 3 Sep 2010 Added French, Italian, Korean, Macedonian, Polish and Chinese translations
2.1.6 4 Sep 2010 Added options in the right-click menu of websites
2.1.7 4 Sep 2010 Reduced Chrome's RAM usage when a beta option was enabled
2.1.8 5 Sep 2010 Allowed users to disable the right-click menu items
2.2 3 Oct 2010 Added support for a toolbar button, packaged as a separate extension.
2.2.7 23 Oct 2010 Added more languages, now at 18 (translation updates are added every time a new release is made, so doesn't get recorded in the changlog much)
2.2.8 20 Nov 2010 Reduces Chrome RAM usage
2.2.13 3 Dec 2010 Automatically subscribed non-English speakers to the appropriate language-specific filter list
2.2.19 15 Dec 2010 Added information to the donation request page to let users know that AdBlock is Michael Gundlach's full-time job
2.2.21 22 Dec 2010 Improved the YouTube ad blocking functionality
2.2.23 27 Dec 2010 Reduced RAM usage in Chrome and increased the speed of AdBlock
2.2.28 20 Jan 2011 Allowed pages to be whitelisted using the official syntax used by Adblock Plus
2.2.30 8 Feb 2011 Allowed users to whitelist Google search ads
2.3 10 Feb 2011 Added a toolbar button in the main extension, as Chrome added support for hiding buttons, retiring the separate extension
2.3.10 9 Mar 2011 Intentionally hid the right-click menu in the Chrome Extensions Gallery
2.3.19 23 Mar 2011 Showed the donation request page to Safari users when they install AdBlock
2.4 3 May 2011 Added many speed improvements—reportedly, the extension is twice as fast, while loading less memory per tab[1]
2.4.1 5 May 2011 Told users who the people who translated AdBlock into their language are, on the options page
2.4.3 10 May 2011 Made the install / donation-request page clearer and easier to understand
2.4.7 28 May 2011 Translated the installation page
2.4.17 11 Jul 2011 Now warns users who have subscribed to many filter lists that the lists will slow them down
2.5 8 Dec 2011 Blocks the download of all advertising resources, including ads in videos and in Flash
2.5.21 16 May 2012 Added "CatBlock", an April Fools' joke. Hidden only as "minor bugfixes" in the changelog
2.5.36 14 Jun 2012 Updated to manifest version 2
2.5.39 6 Aug 2012 Added an icon for Apple's Retina displays on Safari
2.5.55 14 Jan 2013 Added an icon for Retina displays on Chrome
2.5.62 26 Apr 2013 Added links to shar AdBlock to the toolbar button menu
2.6 24 Jun 2013 Simplified the Filter Lists page in the options and added a count of blocked ads to the toolbar button menu and the button itself[12]
2.6.5 23 Aug 2013
  • Links to the support website and code repositories were changed to point to the new sites
  • Notified users about a crowdfunding campaign to create ads for AdBlock
  • Changed the block counter on the toolbar button to grey to avoid it looking like a notification from another extension, such as email counters
2.6.8 23 Sep 2013 Removed the notification about the crowdfunding campaign
2.6.11 25 Oct 2013 Allowed the extension to popup "survey" messages to test out certain features
2.6.15 27 Nov 2013 Added "Fanboy's Annoyances" to the list of recommended filter lists
2.6.16 29 Nov 2013 Changed all references to the old site to the new site
2.6.31 6 May 2014 Allowed users to whitelist specific YouTube channels of their choosing, so that they don't have to enable ads on all YouTube channels
2.7 6 Jun 2014 Changed the design of the options page to look more like the website. 2.7 also added a new "support" tab with links to the code and the support site
2.7.4 20 Jun 2014 Let users access he changelog from the support tab in the options page, which uses the "CHANGELOG.txt" file in the code
2.7.7 11 Jul 2014 A complete refresh of the support tab was made, including a pre-populated bug reporting page
2.7.13 27 Aug 2014 Added "AdBlock warning removal" as a recommended filter list
2.8 28 Aug 2014 A new tab directing to opens every time the Beta version of AdBlock is updated, which lists most important changes for that update
2.9 17 Sep 2014 Added a feature to allow users to synchronize their settings/filter lists/custom filters using Dropbox
2.10 6 Oct 2014
  • Provided the Chrome popup menu for Safari users, who previously had to use a normal-style menu
  • Changed the colour of buttons in the ad blocking and page whitelisting wizards as many users thought the new design made the buttons look disabled
2.11 13 Oct 2014 In the 'Report an Ad' feature, the extension will perform a check for known malware domains in the list of resources on the page. If resources from a known malware site are found, the user is notified, and the a link with removal instructions is provided
2.12 22 Oct 2014 Added the ability to see the name of any non-default filter lists they have subscribed to
2.13 31 Oct 2014 Allowed the user to disable specific filters from their filter lists, which is useful for disabling whitelist filters, which can't normally be overridden
2.14 24 Nov 2014 Removed the optional Spanish-language filter list from the extension, as it caused many bugs with many websites
2.15 9 Dec 2014 Allowed Safari users to view the resource list, something which only Chrome and Opera users had access to before
2.16 2 Jan 2015 Sped up the locating of YouTube channel names by using the YouTube API instead of scanning the HTML and allowed users to disable the ad counter on the toolbar menu from the Options page
2.17 23 Jan 2015 Improved compatibility with the Safari ClickToFlash extension
2.18 5 Feb 2015 Let users be notified if they are on a page which may contain malware domains, using the DNS-BH list of domains
2.19 11 Mar 2015 Various bug fixes, along with improvements to the anonymous data sent to AdBlock's servers.
2.29 21 Apr 2015 Name change, current supported version

AdBlock for Firefox release history[edit]

Discontinued Currently supported Pre-release
Version number[13] Date Released[13] Changes in version[13]
1.1.1 13 Sep 2014 First full release
2.0 11 Nov 2014 Improved performance and new features from Chrome

AdBlock for Firefox[edit]

On September 13, 2014,[13] the AdBlock team released a version for Firefox users, ported from the code for Google Chrome, released under the same free software licence as the original. Later the extension was removed by an administrator on Mozilla Add-ons.[14]


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.[15]

On October 23, 2014 the developer decided to end official support for CatBlock, and made it open-source, under the same license as the original extension.[16]

See also[edit]

  • IE7Pro (for Microsoft Internet Explorer)