As I understand it, you can make a Chromium browser just as privacy friendly as Firefox. I use Vivaldi on my home PC and mobile which is strongly privacy focused and has a ton of small QoL features neither Chrome nor Firefox has (I use both at work, prefer FF over Chrome). (Going off the tangent here) for example, it's incredibly easy to re-open recently closed tabs in Vivaldi with just two clicks—a feature I use all the time—as the recently closed tabs list is very obvious and easy to access in the tab bar itself without the need to futz around in the menus to find browsing history. The customizable speed dial, sidebar menu for things like bookmarks and downloads are really nice and the download manager in Vivaldi is IMO better than FF, too.
The bigger problem is Google having defacto monopoly over browser market and thus having too much influence over how web standards work and how the user can browse the web (I'm old enough to remember "This web page is best viewed on Internet Explorer" messages on websites). The move to manifest v3 to curb content blockers is one such example.