Basilisk is described as 'Free and Open Source XUL-based web browser, featuring the well-known Firefox-style interface and operation. It is based on the Goanna layout and rendering engine (a fork of Gecko) and builds on the Unified XUL Platform (UXP), which in turn is a fork of the Mozilla' and is a Web Browser in the web browsers category. There are more than 100 alternatives to Basilisk for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Basilisk alternative is Mozilla Firefox, which is both free and Open Source. Other great apps like Basilisk are Zen Browser, Brave, Google Chrome and Tor Browser.
it is very different, and not support all the extensions that basilisk supports