Examine source code of DownRight

{
  "manifest_version": 2,
  "name": "DownRight",
  "version": "1.0.2",
  "description": "Puts your DOWNloads in the RIGHT location.",
  "icons": {
    "48": "icons/border-48.png",
    "96": "icons/border-96.png",
    "512": "icons/border-512.png"
  },
  "background": {
    "persistent": true,
    "scripts": [
      "lib/downloadManager.js",
      "lib/downloadLocationRules.js",
      "background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "downloads",
    "management"
  ]
}