Examine source code of Web Develope

{
  "background" : {
    "page": "/background/background.html"
  },
  "content_scripts" : [
    {
      "js" : [
        "/content/content.js" 
      ],
      "matches" : [
        "<all_urls>" 
      ]
    }
  ],
  "default_locale" : "en_US" ,
  "description" : "__MSG_extensionDescription__" ,
  "homepage_url" : "http://chrispederick.com/work/web-developer/",
  "icons" : {
    "16" : "/common/images/logos/16.png",
    "24" : "/common/images/logos/24.png",
    "32" : "/common/images/logos/32.png",
    "48" : "/common/images/logos/48.png",
    "64" : "/common/images/logos/64.png",
    "128" : "/common/images/logos/128.png",
    "256" : "/common/images/logos/256.png",
    "512" : "/common/images/logos/512.png"
  },
  "manifest_version" : 2 ,
  "name" : "__MSG_extensionName__" ,
  "options_ui" : {
    "page": "/options/options.html" 
  },
  "version" : "2.0.5",
  "browser_action" : {
    "browser_style": false,
    "default_icon" : {
      "16" : "/common/images/logos/16.png",
      "24" : "/common/images/logos/24.png",
      "32" : "/common/images/logos/32.png",
      "48" : "/common/images/logos/48.png",
      "64" : "/common/images/logos/64.png",
      "128" : "/common/images/logos/128.png",
      "256" : "/common/images/logos/256.png",
      "512" : "/common/images/logos/512.png"
    },
    "default_popup" : "/overlay/overlay.html",
    "default_title" : "__MSG_extensionName__" 
  },
  "permissions" : [
    "clipboardWrite" ,
    "cookies" ,
    "history" ,
    "storage" ,
    "tabs" ,
    "<all_urls>" 
  ],
  "web_accessible_resources" : [
    "*"
  ]
}