Examine source code of Lowpi.com

{
  "manifest_version": 2,
  "name": "Lowpi.com",
  "description": "__MSG_lowpi_description__",
  "version": "1.2",
  "author": "Manuel Montero",
  "default_locale": "en",
  "browser_action": {
    "default_icon": "lowpi.png",
    "default_popup": "lowpi.html",
    "default_title": "Lowpi.com"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt + L"
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "lowpi.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "storage",
    "cookies",
    "https://lowpi.com/"
  ]
}