Examine source code of Markdown Editor V2

{
  "manifest_version" : 2 ,
  "name" : "Markdown Editor V2",
  "version" : "1.3",
  "description" : "A simple and powerful Markdown editor inside your browser.",
  "icons" : {
    "32" : "icons/logo_32.png",
    "64" : "icons/logo_64.png",
    "128" : "icons/logo_128.png"
  },
  "permissions" : [
    "storage" ,
    "tabs" 
  ],
  "browser_action" : {
    "default_icon" : "icons/logo_64.png",
    "default_title" : "Open Markdown Editor",
    "default_popup" : "popup.html"
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ],
    "persistent" : false 
  },
  "web_accessible_resources" : [
    "editor.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5bcba220-8eb0-45d8-902f-90c8c409a4c5}"
    }
  }
}