Examine source code of cartl

{
  "description": "rtl confluence for supporting persian texts",
  "manifest_version": 2,
  "name": "cartl",
  "version": "1.0",
  "homepage_url": "https://github.com/arshiamids/cartel",
  "icons": {
    "48": "icons/octi.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://sys.pouyarasaneh.com/*"
      ],
      "js": [
        "test.js"
      ]
    }
  ]
}