mozilla/addon-sdk — pull request #1311 by Mook-as (2013-11-29 01:53:25+00:00)
Title: Loader documentation: it actually lives in gre/modules/commonjs/

resource://gre/modules/toolkit/loader.js does not actually exist; resource://gre/modules/commonjs/toolkit/loader.js does, though, and is used by all the in-tree code.