Basilisk Portable is a free and open-source web browser that is designed to be highly customizable and compatible with a wide range of web standards. Developed by the team behind the Pale Moon browser, Basilisk is built on the Goanna layout engine, which provides a high degree of compatibility with Firefox extensions and a familiar interface.

designed to run Adobe Flash content after its official 2021 retirement

Unlike modern browsers like Chrome or Firefox, Basilisk maintains support for NPAPI plugins

Save a simple .swf file locally, or use an internal test page. Drag the .swf into Basilisk or open an HTML file with <embed> or <object> tags pointing to the Flash file.

: Basilisk focuses on intentional development, meaning it won't suddenly remove features you rely on just for the sake of a redesign. How to Get Started Setting up Basilisk Portable with Flash is straightforward: