I use desktop Firefox for almost all my browsing with a number of additional privacy, blocking & anonymising add-ons that I've set to deliberately break everything, except the content. I use Edge on the handful of sites I trust; I can literally count them on one hand.
On the rare occasions I browse on mobile I use Focus. I always use DDG for search regardless of device.
Like most Ars readers I am in the minority that give a damn about privacy. Defaults, deliberate manipulations, a lack of knowledge & the path of least resistance mean the majority will stick with Chrome (or Safari) and with Google for search.
At this point only regulation to strip browsers away from Ad pushers will change the landscape.