Examine source code of Open Downloads Folder

{
  "name": "Open Downloads Folder",
  "description": "Open Downloads Folder",
  "version": "1.0",
  "manifest_version": 2,
  "permissions": [
    "downloads"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "19": "icons/icon-19.png",
    "38": "icons/icon-38.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "Open Downloads Folder"
  }
}