I'd love to say this works perfectly, but unfortunately I'm on windows and the protocol handling doesn't seem to work right. Can't blame the dev who is clearly linux based like a sane person.

Works so far, but one feature is missing on my Firefox 78.4.0esr after the installation of this add-on:

"Also it features a small popup that can be called from the icon in the address bar which provides a way to get the links or terminal commands for opening current page in any available container."