Examine source code of TanPage

{
  "manifest_version": 2,
  "name": "TanPage",
  "version": "1.6.1",
  "description": "Hello TanPage",
  "permissions": [
    "tabs",
    "storage",
    "activeTab",
    "menus",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "chrome_url_overrides": {
    "newtab": "pages/newtab.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{46e93c77-6710-438f-ba0f-eec9bf526bfd}"
    }
  }
}