AdGuard is a fast and lightweight ad blocking browser extension
that effectively blocks all types of ads and trackers.

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AdGuard is a fast and lightweight ad blocking browser extension that effectively blocks all types of ads and trackers on all web pages. We focus on advanced privacy protection features to not just block known trackers, but prevent web sites from building your shadow profile. Unlike its standalone counterparts (AG for Windows, Mac), the browser extension is completely free and open source. You can learn more about the difference here.

AdGuard does not collect any information about you, and does not participate in any acceptable ads program. The only source of income we have is selling premium versions of our software, and we intend to keep it that way.

• Installation
  • Chrome and Chromium-based browsers
  • Firefox
  • Opera
  • Microsoft Edge
• Contribution
  • Translating AdGuard
  • Testing AdGuard
  • Reporting issues
  • Other options
• Development
  • Requirements
  • How to build
  • Linter
  • Update localizations
• Minimum supported browser versions

You can get the latest available AdGuard Extension version from the Chrome Web Store.

You can get the latest version of AdGuard Extension from the Mozilla Add-ons website.

Opera is basically a Chromium browser, but it maintains its own add-ons store. You can get AdGuard Extension from there.

The latest stable version of AdGuard browser extension is available in Microsoft Store.

We are blessed to have a community that does not only love AdGuard, but also gives back. A lot of people volunteer in various ways to make other users' experience with AdGuard better, and you can join them!

We, on our part, can only be happy to reward the most active members of the community. So, what can you do?

If you want to help with AdGuard translations, please learn more about translating our products here: https://kb.adguard.com/en/general/adguard-translations

You can get a beta version of AdGuard Browser Extension for any browser. All necessary information on this topic can be found on a dedicated page on our website.

GitHub can be used to report a bug or to submit a feature request. To do so, go to this page and click the New issue button.

Here is a dedicated page for those who are willing to contribute.

• node.js LTS
• NPM v8
• yarn v1.22

Install local dependencies by running:

  yarn install

Running tests:

  yarn test

Run the following command to build the dev version:

  yarn dev

This will create a build directory with unpacked extensions for all browsers:

  build/dev/chrome
  build/dev/edge
  build/dev/firefox-amo
  build/dev/firefox-standalone
  build/dev/opera

To make a dev build for a specific browser, run:

  yarn dev <browser>

Where <browser> is one of the following: chrome, edge, opera, firefox, firefox-standalone, like this:

  yarn dev chrome

To run dev build in watch mode, run:

  yarn dev --watch

Or for a specific browser:

  yarn dev <browser> --watch

Since version v4.0, AdGuard browser extension uses an open source library tsurlfilter that implements the filtering engine.

While developing the browser extension it may be required to test the changes to tsurlfilter. Here's what you need to do to link your local dev build to the local dev build of tsurlfilter.

1. Clone and build tsurlfilter libraries.

2. Go to the tsurlfilter/packages/tsurlfilter and tsurlfilter/packages/tswebextension directories and run yarn link.

3. Now you can link these packages to the browser extension. To do that run yarn link commands in the root directory of the browser extension root directory:

yarn link @adguard/tsurlfilter
yarn link @adguard/tswebextension

1. Build the browser extension in the watch mode:

yarn dev <browser> --watch

Before building the release version, you should manually download the necessary resources that will be included into the build: filters and public suffix list.

  yarn resources

This command also checks if there are dangerous rules in the filters. See dangerous rules

  yarn beta
  yarn release

You will need to put certificate.pem file to the ./private directory. This build will create unpacked extensions and then pack them (crx for Chrome).

Despite our code may not currently comply with new style configuration, please, setup eslint in your editor to follow up with it .eslintrc

To download and append localizations run:

    yarn locales download

To upload new phrases to crowdin you need the file with phrases ./Extension/_locales/en/messages.json. Then run:

    yarn locales upload

To remove old messages from locale messages run:

  yarn locales renew

To validate translations run:

  yarn locales validate

To show locales info run:

  yarn locales info