Examine source code of Sarcasmatic

{
  "manifest_version": 2,
  "name": "Sarcasmatic",
  "version": "0.1.1",
  "author": "Janil Garcia, Jr.",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content.js"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "menus",
    "tabs",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b3429048-3a20-4fa4-b9c3-72e4b9e761ad}"
    }
  }
}