Examine source code of yooloop

{
  "manifest_version": 3,
  "name": "yooloop",
  "description": "A browser extension for YouTube that adds subtitle interaction and video looping features.",
  "version": "1.0.2",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "192": "icon/192.png",
    "512": "icon/512.png"
  },
  "permissions": [
    "webRequest",
    "storage"
  ],
  "host_permissions": [
    "https://www.youtube.com/watch?v=*"
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "resources": [
        "injected.js"
      ]
    },
    {
      "resources": [
        "content-scripts/content.css"
      ],
      "matches": [
        "https://www.youtube.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "noodlefreeze@gmail.com",
      "strict_min_version": "109.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/watch?v=*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}