Examine source code of Scroll Disabler

{
  "manifest_version": 2,
  "name": "Scroll Disabler",
  "version": "1.0",
  "description": "Disables scrolling any webpage once activated ",
  "icons": {
    "48": "cancel.png",
    "96": "cancel.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "js": [
        "scrolldisabler.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f8d7250f-5fd8-4839-9c25-43e5b24e1c84}"
    }
  }
}