Check out my python gui app secure4link2browser

check out my app for standard browser forwarder, kind of like the "open with" extension for thunderbird, except it is standalone, has additional features, like linked overview for
security reasons ( not to open some weird links : - ) ) and also can serve for purposes of
browser isolation, that means you can open different links to different browsers.

presented on github:

as to usage, you need to set secure4link2browser, set as standard browser in your
app management, with the suffix %u. That %u ensures that the link ist passed over to the app.