Examine source code of nextpage

{
  "manifest_version": 2,
  "name": "__MSG_addonName__",
  "version": "3.2.0",
  "description": "__MSG_addonDescription__",
  "default_locale": "en_US",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "storage.js",
        "nextpage.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "nextpage@yuanle.song",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ]
}