Oh I'm sorry to hear that, we forgot to gametest on firefox. Glad it worked on chrome, initially it was tricky to get the audio working correctly on the web-version(so we had to do some workarounds).
A split-mechanic definitely sounds intriguing, maybe that's something we'll come back to if we do more work on this.
Undo-mechanic on the explore list as well, it would enhance the experience drastically.
Thanks so much for the feedback!