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" negative lookahead" is often used in filters. If the user has installed multiple ad-blocking extensions on their browser, a global limit of 330,000 filtering rules is applied, so AdGuard might have even smaller leeway. According to the vendor, compliance to the new protocol is the only reason for this backward step.įirst, the new extension has to abide by a limit of 30,000 filtering rules and 5,000 dynamic rules set by the users themselves. The new AdGuard extension is technically weaker than its predecessor. Inevitably, the above features introduce severe limitations to special-purpose extensions like ad-blockers.

Replacing background pages with dedicated service workers to improve browser performance.

Moving network request modifications from the extensions to the browser.

Forcing authors to include all functionality within the extension, ending the practice of hosting code remotely.

Limiting extension access to user network requests.

All extensions using the previous version will stop working by January 2023.įrom Google's perspective, Manifest V3 comes to enhance user privacy and security by: The Chrome Web Store stopped accepting extensions built on Manifest V2 in January 2022. Manifest V3 was first announced in 2020 and became available with the release of Chrome 88, which came out in January 2021. In the release announcement, AdGuard analyzes the workarounds they had to implement to comply to the latest requirements, the problems that still exist, and ideas for making the final version as functional as possible. Even so, it highlights the restricting nature of Manifest V3.

It was released to help identify margins for improvement and solutions to limitations. The extension is in an experimental stage. The new ad-blocking extension that complies with Manifest V3 requirements comes from AdGuard, a developer of ad-blocking software.

In version 3 of the manifest, Google changes the webRequest API to block extensions from modifying the data before it's shown to the user, which renders ad-blockers useless. The first ad blocker extension for Chrome that is compatible with Google's Manifest V3 is now available.Īn extension manifest outlines the permissions and abilities a developer includes in an extension for Chrome browser.