Extensions

Browser extensions to check the green credentials of third-party services used on websites.

These browser extensions allow you to check the green credentials of third-party services used on websites without some of the limitations that are present in the Are my third parties green? web version.

Test interactions

Check third-party requests after interaction (e.g. accepting cookie consent).

Test authentication

Check third-party requests for pages that require authentication or have restricted access.

Test location

Check third-party requests based on your actual location (or using a VPN).

Install

The extension can be used on Chrome and Firefox. Click the links below to install it.

How it works

The extensions use the browser's native PerformanceResourceTiming API to get information about the resources that are loaded by a page.

Once it has this information, it filters domains to find third-party requests and then checks for information about them against the Are my third parties green? API.

What information is missing?

Compared to the website version, the extensions only show information about whether a third-party is served from a green host or not. Information about data transfer, caching, or carbon impact is not currently shown in the extensions.

The source code for the extensions are public on GitHub.