Ad Blocking

2002softwareclassic

Ad blocking is the practice of stopping internet advertisements from loading, usually through a browser extension, standalone app, or built-in browser feature1. The first ad blocker was Adblock 0.1, released for the Phoenix browser (later renamed Firefox) by Henrik Aasted Sorensen on December 3, 20022.

Overview

Ad blocking is the practice of stopping web advertisements from loading in a browser, typically through an extension, a standalone app, or a browser-level setting4. The software works by checking every network request the browser sends against a set of filter list rules and cancelling the ones that match, so the ad, tracker, or malicious domain never reaches the third party at all1.

The two names most people run into are Adblock and Adblock Plus, and despite the shared word they were not built by the same team4. Adblock Plus is made by Eyeo GmbH and ships with widely used filter lists like EasyList and EasyPrivacy, the second of which targets third-party tracking domains and fingerprinting scripts1. The extension is licensed under GPLv3 and is available across Chrome, Firefox, Safari, Edge, Opera, and mobile1. On the Chrome Web Store it holds a 4.4 star rating from more than 187,000 reviewers1.

How It Spread

Adblock Plus arrived in 2006 as a Firefox-only extension built by programmers at Eyeo GmbH, and it quickly became the reference implementation for filter-list based blocking5. Chrome users had to wait until 2009, when independent developer Michael Gundlach shipped a separate extension called Adblock for the Chrome Web Store, inspired by but unrelated to Adblock Plus5.

Gundlach kept a sense of humor about the project. On April 1, 2012 he temporarily rebranded Adblock as Catblock, which replaced blocked ad images with pictures of cats and lolcat-style image macros6. Adoption of ad blocking software grew sharply from mid-2012 onward, according to a 2015 report from analytics firm PageFair and Adobe on the financial cost to publishers3.

As blockers spread, publishers pushed back with anti-adblock scripts that detected the extension and gated content behind an unblock prompt4. Users started threads on the Adblock Plus forums looking for workarounds, and filter-list maintainers responded by adding rules that neutralized the anti-adblock scripts, arguing that some of them doubled as privacy and security risks4.

How to Use This Meme

Users typically install an extension like Adblock Plus from their browser's extension store and let it run in the background1. The default install ships with common filter lists such as EasyList; more aggressive setups often add EasyPrivacy for tracker blocking or extra malware lists, and advanced users can write their own custom filter rules1.

Frequently Asked Questions