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.
Reader will ask to install the extension when you press ‘b’.
Thank you for telling about extension compatibility.