This is a nice project — I'm glad that you posted this because I've never read source code for browser extensions before.

With that, after looking through hnprofile.js and am curious if you had a roadmap in mind for improving it? These two things came to mind:

- Adding localstorage for caching info from each fetch, adding last-visited etc

- Adding formatting options for the drop

I'm interested in adding support for the first item if you'd like contributions. You can email me if you'd like to chat.