Examine source code of Scroll Everywhere

{
  "manifest_version": 2,
  "name": "Scroll Everywhere",
  "version": "1.1resigned1",
  "description": "Activate the scroll bar on the pages that are being viewed even if it has been disabled",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*",
        "file:///*"
      ],
      "js": [
        "scrolleverywhere.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ef974f9f-8d30-4aea-a41a-6a40f7cd44e7}"
    }
  }
}