Is AdGuard AdBlocker Safe? — Extension Safety Profile

AdGuard AdBlocker is a popular content-blocking extension that requests a broad set of permissions typical for its category. It can read and modify network requests on all websites ( host access, webRequest, declarativeNetRequest), access browser tabs and navigation, and use storage for rules and settings. The scripting and userScripts permissions allow it to inject code into pages to hide ad elements or apply advanced filters. While this scope is expected for a full-featured ad blocker, it also means the extension has deep visibility into your browsing activity.

For any ad and content blocker, a careful user should be aware that such extensions can see all URLs you visit and page content. This is necessary to block ads and trackers, but it places significant trust in the developer. Users should prefer well-known, open-source blockers with a long track record and active maintenance. Ad blockers are also sometimes targeted by copycat or malicious clones, so installing from the official store listing and verifying the publisher name is important.

In this assessment, the extension scores highly on Data & Privacy and Community Reputation, reflecting strong user trust and declared privacy practices. The weakest dimension is Publisher & Identity, which suggests some room for improvement in transparency or verifiable corporate details, though this does not indicate any specific wrongdoing.