I haven't used an extension itself, but the code is very pleasant to look at, clean and functional (which is not surprising given your Haskell background). Is this your first attempt at using React? How hard would it be to port it to Safari?
Thanks! This was not my first project with React, but it was a playground for me to experiment with some novel React ideas (like css-in-js) and different ways of structuring the application. After some frustrating attempts to organize Tabli using Flux I ended up abandoning Flux and creating my own alternative micro-framework called OneRef, a sort of Redux-lite for use with the wonderful Immutable.js library for maintaining application state. I have a draft Medium post about this that I hope to publish one of these days...