After the announcement of Mozilla's new terms of use, we suspect many disappointed users will look elsewhere, but we feel Firefox – or one of its derivatives – remains the best browser option. As The Register warned last month, this week's new version of Google Chrome disables uBlock Origin. In time, this change will likely make its way downstream to other Chromium-based browsers. One of those is Microsoft Edge, which has started switching off uBlock Origin and other Manifest V2-based extensions. Brave is another Chromium browser but has its own ad blocking built-in.
One remaining option for Chrome users is the less-capable uBlock Origin Lite.
The unrestricted uBlock Origin still works fine in Firefox, as well as its various downstream browsers such as LibreWolf – version 136 of which will no doubt appear soon. As before, Waterfox remains based on the ESR edition of Firefox – currently, that means Firefox 128.
The absolute worst browser for privacy is Chrome. But that's what most people use. It's the default on Android and most people stick with the default. I don't think most users are bothered about privacy, at least not to the extent of doing anything about it. And browsers are less important on mobile as the big sites move everything into an app and smaller sites use Facebook.