Examine source code of BlockFC

{
  "manifest_version": 2,
  "name": "Roca",
  "version": "1.3",
  "description": "Removes nsfw content from the website forocoches.com.",
  "icons": {
    "48": "border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.forocoches.com/*"
      ],
      "js": [
        "jquery-3.4.1.min.js",
        "roca.js"
      ]
    }
  ]
}