Brave is a solid option if you don't want to leave the underlying Chromium and it's extension ecosystem but still have privacy capabilities that Google is axing with Manifest v3.
Firefox is also a solid option. Firefox is one of the few stable options remaining to use a non-Chromium based browser. Most popular Chrome extensions have Firefox releases as well so you may not even lose that functionality in a switch.
Advocates for Firefox frequently point out that part of how we got here with the Manifest v3 issues is by consolidating browser technologies. Chrome, Brave, Edge, etc all use the Chromium core which is part of what gives Google such a strong ability to influence web technology developments to their advantage and our detriment. If this is something you care about then it may be worth voting with your feet and giving Firefox a chance.
The new DDG browser may be interesting in this regard. It uses WebKit at least on Mac, but we'll see how their Windows version ends up like. Could very well be Edge WebView2.
Firefox is also a solid option. Firefox is one of the few stable options remaining to use a non-Chromium based browser. Most popular Chrome extensions have Firefox releases as well so you may not even lose that functionality in a switch.
Advocates for Firefox frequently point out that part of how we got here with the Manifest v3 issues is by consolidating browser technologies. Chrome, Brave, Edge, etc all use the Chromium core which is part of what gives Google such a strong ability to influence web technology developments to their advantage and our detriment. If this is something you care about then it may be worth voting with your feet and giving Firefox a chance.