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Not to be confused with Adblock Plus.
Adblock logo.png
Original author(s) Michael Gundlach
Developer(s) BetaFish Incorporated
Initial release December 8, 2009 (2009-12-08)
Stable release Chrome, Safari, Opera:
2.47 / January 19, 2016; 14 days ago (2016-01-19) (Google Chrome)[1] January 20, 2016; 13 days ago (2016-01-20) (Opera)
Preview release

Chrome, Safari, Opera:
2.19 / December 3, 2015; 61 days ago (2015-12-03)
2.4 / August 25, 2015; 5 months ago (2015-08-25)[1] (No longer supported)[2]

Adblock for Firefox mobile
2.3 / October 22, 2015; 3 months ago (2015-10-22)[1] (No longer supported)[2][3]
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[4]
Type Browser extension
License GPLv3[1]

AdBlock is a content filtering and ad blocking extension for the Google Chrome, Apple Safari, Mozilla Firefox, and Opera web browsers.[4][5][6][7] AdBlock allows users to prevent page elements, such as (and mainly) advertisements, from being displayed. It is free to download and use, AdBlock uses an optional donate any amount they want to the developers.[8] It is a popular Safari extension.[9] According to an article in The New York Times,[10] 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.[citation needed]

AdBlock is not to be confused with Adblock Plus. The creator[who?] of AdBlock claims to have been inspired by the Adblock Plus extension for Firefox, which is itself based on another extension called Adblock. But otherwise AdBlock is unrelated to the other efforts.[11][12]

Acceptable Ads Program and sale[edit]

Further information: Ad blocking

AdBlock was sold to an anonymous buyer in 2015. In the terms of the deal, original author 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.[13]

Acceptable Ads defines guidelines to identify "non-annoying" ads, which AdBlock now shows by default. The intent is to allow non-invasive advertising, so as to maintain support for websites that rely on advertising as a main source of revenue.[13]

AdBlock for Firefox[edit]

On September 13, 2014,[6] 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.[citation needed] The extension was removed on April 2, 2015 by an administrator on Mozilla Add-ons.[14]

The official site's knowledge base article on December 7, 2015 stated that future build's of Firefox desktop and Firefox Mobile will not be supported.[2][3] The article states:

"Although we are no longer developing new versions of AdBlock for Firefox on desktop and Android, it will still be available for download, and we’re happy to give you a hand using it."[2]"If you can’t bear the thought of using another ad blocker, you can go on using AdBlock in Firefox, but not indefinitely. Firefox version 44 will stop allowing unsigned extensions, which, due to circumstances beyond our control, AdBlock is."[2]


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 GPLv3 licensing, as the original extension.[16]

See also[edit]


  1. ^ a b c d e "Index of /releases". Index of /releases. Adblock. Retrieved 20 January 2016. 
  2. ^ a b c d e "Why did AdBlock stop supporting Firefox?". Official Adblock support. Adblock. Retrieved 19 January 2016. 
  3. ^ a b "Is AdBlock available on iPhone, iPad, or Android?". Adblock Mobile. Retrieved 20 January 2016. 
  4. ^ a b "AdBlock - Chrome Web Store". 2015-06-10. Retrieved 2015-06-18. 
  5. ^ "Apple - Safari - Safari Extensions Gallery". Retrieved 2015-06-18. 
  6. ^ a b [1][dead link]
  7. ^ "AdBlock extension - Opera add-ons". Retrieved 2015-06-18. 
  8. ^ "AdBlock is pay-what-you-want software". AdBlock. AdBlock. Retrieved 22 January 2016. 
  9. ^ "Apple - Safari - Safari Extensions Gallery". Apple Inc. Retrieved 2016-01-22. 
  10. ^ "In Allowing Ad Blockers, a Test for Google". The New York Times. Retrieved 2015-06-18. 
  11. ^ Kurdi, Samer (June 22, 2011). "Adblock v. Adblock Plus: two Chrome extensions compared". Retrieved 26 May 2013. 
  12. ^ Gundlach, Michael (August 2013). "AdBlock is not Adblock Plus". Retrieved 22 December 2014. 
  13. ^ a b Williams, Owen. "Adblock extension sells to mystery buyer". Retrieved 2015-10-02. 
  14. ^ "AdBlock for Firefox". Mozilla Add-ons. 
  15. ^ "AdBlock's Blog: CatBlock lives on". 2012-04-03. Retrieved 2015-06-18. 
  16. ^ "CatBlock from AdBlock". Retrieved 2015-06-18. 

External links[edit]