About Decentraleyes
Decentraleyes tackles one narrow form of tracking: shared content delivery networks. Many sites load common libraries from a free CDN run by a large company, and every visitor's browser then asks that network for the file, which lets it see the site you came from. Decentraleyes catches those requests and answers them with a copy stored in the extension, so nothing reaches the CDN and the page still works.
Its Firefox listing says it complements regular content blockers. A blocker removes things, while Decentraleyes substitutes them, so sites that depend on those libraries keep working. It is free and open under MPL-2.0.
The limit is coverage. It can only serve the library versions it ships with, so unusual files still go to the network, and it overlaps with tools that already block or replace these requests. It has about 250,000 users on Firefox, where it is Recommended, 100,000 on Chrome and about 50,000 on Edge, and version 3.0.2 arrived in August 2026. Treat it as a small, set-and-forget companion to a blocker, not a replacement for one.
Pros and cons
- Stops requests to shared CDNs such as Google Hosted Libraries
- Serves local copies, so pages that need the library keep working
- Free, MPL-2.0 licensed
- Recommended on Firefox, updated as recently as August 2026
- Covers only the libraries bundled with it
- Overlaps with the list-based blockers many people already run
- Does nothing about trackers outside CDNs
Permissions
It can see and redirect requests on all websites, and read tab and navigation information. It needs this to spot CDN requests and replace them with local files.
