Upload background tab webextension to the addons.mozilla.org
It would be nice to have official support for Firefox. I was able to copy the chrome extension and install it with no code changes. I used the "self distribution" feature to take care of this for myself, and I'd be happy to make that public. However... if I were someone else I'd prefer to get it from you.
Erik Simmler shared this idea
Reader will ask to install the extension when you press ‘b’.
Thank you for telling about extension compatibility.