Shift feels like a weird recommendation. Nearly all browsers these days are a fork of firefox or chromium. Their website seems notably unforthcoming about what their browser even is. There are plenty of open source forks of firefox and chrome that strip out the vendor spyware, that are also known and reputable. Those would all be a better choice.

Shift doesn't even have a Wikipedia page, nor is it on their list of web browsers. And that list has some really weird ones like iCab, Lynx, and qutebrowser.