在Firefox Addon页面脚本中加载JSON文件，包中的所有内容都在本地加载

I have been developing a Firefox extension using the Addon SDK and need to load some data that is stored in the same package, as a separate file: "data.json". It needs to be loaded from a page script, i.e. "loader.js" which is included in the "panel.html" using the script src tags. I have been developing a Firefox extension usin