nixpkgs/nixos/gui/application.ini

[App]
;
; This field specifies your organization's name.  This field is recommended,
; but optional.
Vendor=NixOS
;
; This field specifies your application's name.  This field is required.
Name=NixOS-gui
;
; This field specifies your application's version.  This field is optional.
Version=0.1
;
; This field specifies your application's build ID (timestamp).  This field is
; required.
BuildID=20110424
;
; This field specifies a compact copyright notice for your application.  This
; field is optional.
;Copyright=

;
; This ID is just an example.  Every XUL app ought to have it's own unique ID.
; You can use the microsoft "guidgen" or "uuidgen" tools, or go on
; irc.mozilla.org and /msg botbot uuid.  This field is optional.
;ID=

[Gecko]
;
; This field is required.  It specifies the minimum Gecko version that this
; application requires.
MinVersion=1.9a5
;
; This field is optional.  It specifies the maximum Gecko version that this
; application requires.  It should be specified if your application uses
; unfrozen interfaces.
MaxVersion=2.*