Examine source code of OSM Smart Menu

{
  "name": "__MSG_extensionName__",
  "short_name": "__MSG_extensionShortName__",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "minimum_chrome_version": "45",
  "author": "João Guilherme Packer",
  "homepage_url": "https://github.com/jgpacker/osm-smart-menu",
  "version": "0.17.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "osm-smart-menu@jgpacker.me.br"
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "icons": {
    "48": "icons/osm48x48.png",
    "96": "icons/osm96x96.png",
    "128": "icons/osm128x128.png"
  },
  "background": {
    "scripts": [
      "background-listeners-setup.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/osm16x16.png",
      "48": "icons/osm48x48.png",
      "96": "icons/osm96x96.png"
    },
    "default_title": "__MSG_extensionName__",
    "default_popup": "popup/index.html"
  },
  "options_ui": {
    "page": "options/index.html"
  },
  "commands": {
    "_execute_browser_action": {}
  },
  "manifest_version": 2
}