This interface provides information about the host application. It can be used to distinguish between different Mozilla-based applications. It provides application name, application version, Gecko version and more.
1.0
38.0.5
Introduced
Gecko 1.8
Inherits from:
nsISupports
Last changed in Gecko 1.8 (Firefox 1.5 / Thunderbird 1.5 / SeaMonkey 1.0)In XULRunner applications nsIXULAppInfo obtains app-specific information from application.ini.
Implemented by: @mozilla.org/xre/app-info;1. To create an instance, use:
var xulAppInfo = Components.classes["@mozilla.org/xre/app-info;1"]
.getService(Components.interfaces.nsIXULAppInfo);
The nsIXULRuntime interface is also implemented by "xre/app-info". It contains advanced information on the xul runtime.
Attributes
| Attribute | Type | Description |
appBuildID |
ACString |
The application's build ID/date, for example "2004051604". For XULRunner applications, this will be different than the build ID of the platform. Be careful about which one you want. Read only. |
ID |
ACString |
The XUL application's UUID. Can be an empty string, if id is not set. Has to be defined for advanced application features such as the extension manager and update service. This has traditionally been in the form "{AAAAAAAA-BBBB-CCCC-DDDD-EEEEEEEEEEEE}" but for new applications a more readable form is encouraged: "appname@vendor.tld". Only the following characters are allowed: a-z A-Z 0-9 - . @ _ { } * Read only. |
name |
ACString |
The name of the application. This must be ASCII, and is normally mixed-case, for example "Firefox", "Thunderbird" or "SeaMonkey". Must not be null or an empty string. Read only. |
platformBuildID |
ACString |
The build ID/date of Gecko and the XULRunner platform. Read only. |
platformVersion |
ACString |
The version of Gecko or XULRunner platform, for example "1.8.1.19" or "1.9.3pre". In "Firefox 3.7 alpha 1" the application version is "3.7a1pre" while the platform version is "1.9.3pre" Read only. |
vendor |
ACString |
The name of the application vendor. This must be ASCII, and is normally mixed-case, for example "Mozilla". Can be an empty string if vendor is not set. Read only. |
version |
ACString |
The XUL application's version, for example "0.8.0+" or "3.7a1pre". It is different than the version of Gecko or the XULRunner platform. Be careful about which one you want! Can be an empty string, but a valid value is required for XUL applications using the extension manager or update service. Read only. |
Example
Display the application and the gecko version in an alert box:
var info = Components.classes["@mozilla.org/xre/app-info;1"]
.getService(Components.interfaces.nsIXULAppInfo);
alert("Application Version: " + info.version + "\n"
+ "Gecko Version: " + info.platformVersion);
Example
This example here uses nsIXULAppInfo to get the version of the current browser and then compares it: Example - Compare current browser version