Waterfox is built on top of Gecko (Firefox), so it shares many of its benefits. It differentiates itself by taking a privacy-first approach while still maintaining usability. One criticism it previously faced was that it was bought out by an ad company System1. This is no longer the case, and it is run by the founder. As such, though, it is often a few weeks behind the latest version of Firefox and has poorly supported mobile apps. Recommended for those looking for better privacy than Firefox out of the box, but not at the expense of usability that can come with other browsers.