Examine source code of Hide DISHA

{
  "manifest_version": 2,
  "name": "Hide DISHA",
  "version": "1.1resigned1",
  "description": "Hides 'Ask DISHA' on IRCTC Indian Railways Website",
  "content_scripts": [
    {
      "matches": [
        "*://www.irctc.co.in/nget/*"
      ],
      "js": [
        "app.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4332859e-fde6-4e69-a21b-81b021400f27}"
    }
  }
}