Interesting that Kagi is making their browser available on Linux. The key question is: does it actually respect privacy better than Firefox?
Firefox with the right configuration (Enhanced Tracking Protection strict mode, uBlock Origin, DNS-over-HTTPS) is already very solid. The main advantage of a WebKit-based browser would be rendering diversity โ reducing the monoculture risk of everything being Chromium.
One thing worth checking with any new browser: what headers does it send, and how unique is its fingerprint? A privacy-focused browser that sends distinctive headers could actually make you more identifiable, not less.