And what was Chromium based on? WebKit. And what was WebKit based on? KHTML.
Chromium was simply a continuation of innovation that had started before Google even existed.
But in parallel it was Firefox that broke the Internet Explorer monopoly that made 3rd party browsers technically possible in the first place.
But all of that would have been irrelevant if it wasn’t from anti trust actions that prevented MS from doing the stuff they’re doing now (now that the antitrust probationary period is over) such as forcing their browser to be the default browser.
If it wasn’t for antitrust action against MS they would have taken these actions when they were much stronger and the other browsers were not as advanced and Chrome would likely have been nowhere to be seen.
Anyways, you’re wrong even with the idea that chromium has innovated the most. Most of the ideas that Chrome has today were implemented in other smaller browsers such as Opera well before Chrome ever integrated them.
I suspect if Chrome were to disappear tomorrow, browser technology would be far more innovative 2 years from now than it will be with Chrome as the dominant browser.