We're looking for a person or people to help audit MDN to find places we could speed up. Is this you or someone you know? Check out the RFP: https://mzl.la/2IHcMiE


This content covers features introduced in Thunderbird 3

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").


extIApplication Objects

steelIApplication Objects


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);

Other Resources

Document Tags and Contributors

 Last updated by: chrisdavidmills,