Examine source code of dotOrg

{
  "description": "Web experience research",
  "manifest_version": 2,
  "name": "dotOrg",
  "version": "1.0",
  "icons": {
    "64": "icons/network-64.png"
  },
  "browser_action": {
    "default_icon": "icons/network-32.png",
    "default_title": "dotOrg",
    "default_popup": "popup/jfox_ui.html"
  },
  "permissions": [
    "activeTab",
    "history",
    "tabs",
    "storage",
    "downloads"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  }
}