Examine source code of hub_scrub

{
  "version": "1.1",
  "manifest_version": 2,
  "name": "hub_scrub",
  "permissions": [
    "downloads"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.pornhub.com/view_video.php*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1a4ebc7a-265a-464c-8521-d9f8510a354d}"
    }
  }
}