Examine source code of zajel

{
  "manifest_version": 2,
  "name": "zajel",
  "version": "1.0",
  "description": "fix the height and the width of zajel.najah.edu",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://zajelbs.najah.edu/*"
      ],
      "js": [
        "zajel.js"
      ]
    }
  ]
}