Examine source code of DTF ReReDesign

{
  "manifest_version": 3,
  "name": "DTF ReReDesign",
  "version": "1.8.4",
  "description": "Правильный редизайн дтф",
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "https://dtf.ru/*",
    "https://vc.ru/*"
  ],
  "icons": {
    "16": "img/LOGO16.png",
    "32": "img/LOGO32.png",
    "48": "img/LOGO48.png",
    "128": "img/LOGO128.png"
  },
  "background": {
    "scripts": [
      "static/js/background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://dtf.ru/*",
        "https://vc.ru/*"
      ],
      "js": [
        "inject-subsiteOrder.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "https://dtf.ru/*",
        "https://vc.ru/*"
      ],
      "js": [
        "static/js/content.bundle.js"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_icon": {
      "16": "img/LOGO16.png",
      "32": "img/LOGO32.png",
      "48": "img/LOGO48.png"
    },
    "default_popup": "index.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "img/dtf_eyes.png",
        "inject-fetch-patch.js",
        "cleanup-fetch-patch.js",
        "inject-subsiteOrder.js"
      ],
      "matches": [
        "https://dtf.ru/*",
        "https://vc.ru/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "dtf-re-redesign@mail.com"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}