Comment 12 for bug 934887

(In reply to comment #9)
> One other downside to removing minor versioning from the UA: we wouldn't be
> able to easily tell if a user posting a bug report or support request has fully
> updated their browser anymore.

One option would be making an async JS API for querying detailed information, and that API would require user authorization per-site like geolocation. I think it's the wrong tradeoff to expose the data that satisfies use cases on a handful of Mozilla's own sites to the whole Web with every HTTP request.