I'm currently working on creating a sidebar app similar to Honey's UI [1]. Have you made any progress implementing the sidebar look? It doesn't seem very documented and even Honey seems to do it in a hacky way.
Sorry I haven't used Honey, and the demo video didn't seem to show a sidebar? Also I actually inherited this codebase, but yeah our sidebar looks good. It just injects a container div into the site.
[1]: https://chrome.google.com/webstore/detail/honey/bmnlcjabgnpn...