Earlier quoted context omitted.
I honestly don't remember what the last time was Chrome introduced some cool new feature in Chrome. Maybe the PDF reader?
PWA, WebComponents, File Access, Worklets and Houdini and everything else in HTML5/CSS3 still missing from ChromeOS are all being pushed by Chrome.
Firefox has developed Container Tabs, First Party Isolation, integrated Tracking Blocker, an early alpha for a password manager, Screenshots, Firefox Sync, DNS over HTTP and eSNI, not to mention that Mozilla lets addons do much more with the browser so an addon can really change how your browser works instead of being severely limited in what it can do.