Examine source code of Buskaliza

{
  "name": "Buskaliza",
  "description": "Buskaliza Chrome Extension",
  "version": "1.0.12",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "webRequest",
    "http://*.buskaliza.mx/*",
    "https://*.buskaliza.mx/*",
    "http://localhost:3000/*"
  ],
  "icons": {
    "16": "/images/appbus-16_x_16.png",
    "32": "/images/appbus-32_x_32.png",
    "48": "/images/appbus-48_x_48.png",
    "128": "/images/appbus-128_x_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*.buskaliza.mx/*",
        "https://*.buskaliza.mx/*",
        "http://localhost:3000/*"
      ],
      "js": [
        "contentScript.js"
      ],
      "all_frames": true,
      "run_at": "document_idle"
    }
  ]
}