Introduction
Positron is not a framework or a library. It's just a quick hacky way to build desktop applications using Firefox binaries inside a Flatpak environment, where the content is served by a Python web server.
So, you design your frontend with HTML and CSS, while your backend logic is written with your favorite Python libraries. No need to say that you can use JavaScript libraries to add interactivity to your application.
With our custom Firefox profile, we make sure that the application looks like a desktop application. You can customize it using CSS as you wish.