Chromium is an free and open-source browser project.Chromium should not be confused with Google Chrome. However, the Google Chrome browser is built on top of Chromium. So are Microsoft Edge and Opera.

As a result, different engineers, Google engineers included, are working on improving the Chromium browser. All other browser vendors that are using Chromium will benefit from improvements as well.

Fun fact: Chromium codebase contains 37.7 million source lines of code at time of writing

For example, Core Web Vital metrics are not supported in all browsers. But browsers built on top of Chromium do support these metrics.This is convenient for Real User Monitoring solutions, as they are then able to track Core Web Vitals data across more users, but also more browsers.