Examine source code of Make America Kittens Again

{
  "manifest_version": 3,
  "name": "Make America Kittens Again",
  "description": "Replaces images of Donald Trump with kittens. Again.",
  "version": "2.2.8",
  "options_page": "makaoptions.html",
  "permissions": [],
  "icons": {
    "48": "maka48.png",
    "128": "maka128.png"
  },
  "action": {
    "default_icon": {
      "48": "maka48.png",
      "128": "maka128.png"
    },
    "default_title": "#MAKA",
    "default_popup": "makaoptions.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "jquery-3.3.1.min.js",
        "maka.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "kittens/1.jpg",
        "kittens/2.jpg",
        "kittens/3.jpg",
        "kittens/4.jpg",
        "kittens/5.jpg",
        "kittens/6.jpg",
        "kittens/7.jpg",
        "kittens/8.jpg",
        "kittens/9.jpg",
        "kittens/10.jpg",
        "kittens/11.jpg",
        "kittens/12.jpg",
        "kittens/13.jpg",
        "kittens/14.jpg",
        "kittens/15.jpg",
        "kittens/16.jpg",
        "kittens/17.jpg",
        "kittens/18.jpg",
        "kittens/19.jpg",
        "kittens/20.jpg",
        "kittens/16.jpg",
        "kittens/17.jpg",
        "kittens/18.jpg",
        "kittens/19.jpg",
        "kittens/20.jpg",
        "kittens/21.jpg",
        "kittens/22.jpg",
        "kittens/23.jpg",
        "kittens/24.jpg",
        "kittens/25.jpg",
        "kittens/26.jpg",
        "kittens/27.jpg",
        "kittens/28.jpg",
        "kittens/29.jpg",
        "kittens/30.jpg",
        "kittens/31.jpg",
        "kittens/32.jpg",
        "kittens/33.jpg",
        "kittens/34.jpg",
        "kittens/35.jpg",
        "kittens/36.jpg",
        "kittens/37.jpg"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{47c21db3-b82d-485d-b06d-dd70de414242}"
    }
  }
}