Not to derail this topic. But might be an idea to keep an eye on “Discorkie” project.
Though if it is just the bloat of the browser. You could just use the “install app” say in chrome to have a somewhat stripped down version of chrome browser as an ap.
I can appreciate wanting to stick with a oreferred browser/platform. However older OSes and browsers often lack newer features and have other security hole potentiomal due to not supporting newer standards.