Examine source code of Gelbooru - Image Only

{
  "manifest_version": 2,
  "name": "Gelbooru - Image Only",
  "version": "1.0",
  "description": "Adds a link to view the image in the thumbnail without having to go to the page.  Avoid ads, and view more images faster.",
  "content_scripts": [
    {
      "matches": [
        "*://*.gelbooru.com/*"
      ],
      "js": [
        "jquery-3.4.1.min.js",
        "content.js"
      ]
    }
  ]
}