LibreWolf is better, includes ublock and no tracking by default.
There are good chromium based browsers too, I'm not aware of Vivaldi having any major controversies or shady business decisions in recent years, it has a built in adblock thats independent of chromium's upstream.
If you disqualify every browser due to its upstream having issues then you should probably revert to using CURL or something convoluted like what richard stallman does. Every browser that exists today is a fork of some browser that previously was good but started to suck.
If the only reason google doesn't have a monopoly on web standards is because firefox "exists", then I think Google does in fact have a monopoly on web standards. Other browsers exists besides chrome and firefox ones, some like Konqeror even work pretty well for how old they are, but I think firefox is eventually going to see the same fate as netscape slowly becoming more and more irrelevant, and unlike netscape they can't exactly sue Google for anti-trust (at least not without losing 90% of their funding)