Chromium have same codebase as Chrome, it is basically public version of its code. Here one winner gave a good list of nearly all derivatives of Google and Mozilla code.

Google code seem to be worse than Mosilla, since Google removed an ability to disable so named "service workers", i.e. site scripts that continue to run even if you close visited web-page. You could check running service workers in about:serviceworkers in Mozilla browser and chrome://serviceworker-internals/ in Google browser (browser://serviceworker-internals/ in Chromium based Opera). You will be amased how much surveillance crap you gathered during browsing. In Firefox you still could disable that insane crap via the dom.serviceWorkers.enabled=false in about:config In chrome based browsers there are no way to disable them at all.