Examine source code of Buy With JAUCE

{
  "manifest_version": 2,
  "name": "Buy With JAUCE",
  "description": "You can purchase amazon's items in jauce.",
  "version": "1.2",
  "icons": {
    "16": "images/icon_16.png",
    "48": "images/icon_48.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "css/content/style.css"
      ],
      "js": [
        "js/content/common.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "19": "images/icon_19.png",
      "38": "images/icon_38.png"
    },
    "default_title": "Buy With JAUCE",
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "webNavigation",
    "*://*.jauce.com/*"
  ]
}