no, but it is also built on firefox. the browsers i recommended above are the top notch for privacy used in conjunction with a vpn.
i truly hope mullvad will continue to gain momentum since anonymity depends on users being able to blend in with the crowd.
the fact is, if we lose firefox, google chrome continues its monopoly.
tor browser is based on firefox. librewolf has zero telemetry and strong fingerprint resistance.
i still believe it is important to support mozilla (they are working on opn source ai rn) though i question decisions like above.
i wish grapheneos would give us vanadium (chromium based) for desktop. i would not use ungoogled chromium unless i absolutely have to, in that case i would use brave, but not a fan of the company or the founder even though chromium is more secure than firefox with much stronger sandbox implementation.