>>241
include()関数？と思って JSLib 見てみたら…
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const PROG_ID = "@mozilla.org/moz/jssubscript-loader;1";
const INTERFACE = "mozIJSSubScriptLoader";
const Inc = new Compornents.Constructor(PROG_ID, INTERFACE);
(new Inc()).loadSubScript(aScriptPath);
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及び
http://lxr.mozilla.org/mozilla/source/js/src/xpconnect/idl/mozIJSSubScriptLoader.idl
こんなもん用意されてたとはっ(当然？)