Examine source code of javascript

{
  "manifest_version" : 2 ,
  "name" : "javascript",
  "description" : "add javascript that will run on this domain",
  "version" : "0.4.0",
  "icons" : {
    "64" : "icons/64.png",
    "512" : "icons/512.png",
    "1052" : "icons/icon.png"
  },
  "permissions" : [
    "activeTab" ,
    "storage" ,
    "unlimitedStorage" 
  ],
  "background" : {
    "scripts" : [
      "background_script.js" 
    ]
  },
  "content_scripts" : [
    {
      "matches" : [
        "*://*/*" 
      ],
      "js" : [
        "content_script.js" 
      ]
    }
  ],
  "browser_action" : {
    "default_icon" : {
      "64" : "icons/64.png",
      "512" : "icons/512.png",
      "1052" : "icons/icon.png"
    },
    "default_popup" : "browserAction/index.html",
    "default_title" : "javascript"
  },
  "options_ui" : {
    "page": "options/index.html" 
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d4bc778f-3a98-44f4-9b2e-45fab92a21db}"
    }
  }
}