Examine source code of Longman

{
  "description": "__MSG_extensionDescription__ ",
  "manifest_version": 2,
  "name": "Longman",
  "version": "1.1resigned1",
  "icons": {
    "32": "icons/search.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "subfunc.js",
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "32": "icons/search.png"
    }
  },
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{6e27d4c2-dfcf-48a1-9f36-94ce1cae970e}"
    }
  }
}