I found this in Mozilla Support:-
.0.1 Funnelcake Jul 2012 mozilla14 - 1.0 I don't understand this because I used the same update file down- loaded from Mozilla NL for both machines. Please tell me what this means....The Funnelcake releases are from Mozilla, they are identical to standard releases in function, but have a couple of preferences changed in order to identify a particular version of Firefox that was downloaded over a short period of time. The idea behind this is to assist...in identifying usage data for Firefox anonymously, such as the proportion of those who download Firefox who become long term users. A Funnelcake version will be made available for download from a particular source for a short period of time. Mozilla will then know...the number of downloads for that version. It will next count how many times it has been installed by the number of times the "first run" page is loaded for that Funnelcake version. In a subsequent update, it will count the number of Funnelcake versions are updated. All of this data is anonymous, it does not track which computers are using it, instead it keeps track of the number of downloads & updates there are.