The article explains some of the background to chromium which I hadn't known.

Google's Chrome is a freeware release with deeper ties to Google's ecosystem, while Chromium, released at the same time as Chrome in 2008, is open source. Google has slowly loosened its de facto control of the project, particularly since 2020, allowing outside developers into its leadership, softening its stance on non-Google-derived features and opening up its "Goma" development scheme for Chromium, as detailed by CNET in 2020.