That's not the killer feature. I'm not sure where you got that impression. It's the integrated whole which is the feature. Sorry it seems not to work on firefox, but I'll definitely work on that. It's a desktop application with a "web preview" that is being presented here. Most lawyers never interact with the web preview (or the website for that matter) because it just arrives on their desktop.

Agree to disagree on the UX, but points very much appreciated!

[Edit: what OS and generally what type of edit? Firefox on Windows is working, but perhaps there's a specific edit which caused it to crash. Thanks so much!]