STEEL is deprecated and will be removed as of Thunderbird 52. Consider using the functions found in AppConstants.jsm or Services.jsm instead
STEEL is the Scriptable Thunderbird Easy Extension Library. It is a FUEL-like set of interfaces to facilitate Thunderbird extension development.
Currently, STEEL has an steelIApplication interface that implements all the functions of extIApplication. The library has also been implemented in Firefox ("FUEL") and in SeaMonkey ("SMILE").
Objects
extIApplication Objects
- extIApplication
- extIConsole
- extIEventItem
- extIEventListener
- extIEvents
- extIExtension
- extIExtensions
- extIPreference
- extIPreferenceBranch
- extISessionStorage
steelIApplication Objects
XPCOM
Although the STEEL steelIApplication object is preloaded into XUL scripts, it is not preloaded into JavaScript XPCOM code. The object needs to be accessed like any other XPCOM service:
var Application = Components.classes["@mozilla.org/steel/application;1"].getService(Components.interfaces.steelIApplication);