I find myself looking for a "just a browser" browser, like I remember from the late 1990s.
Firefox calls home, and has Firefox Sync and Pocket integrated.
Edge calls home, and is tied into your Microsoft account. (Along with the rest of Windows 10.)
Who knows what Chrome is sending back to Google, probably way more than I fear.
Safari is close, but only exists on macOS and integrates with iCloud.
The closest I've found far is "GNOME Web" (which used to be called Epiphany). It's Just A Browser! But as far as I know, being a GTK application, it doesn't function well outside of the GNOME desktop.
The world needs a new, open source, cross-platform, Just A Browser.