Examine source code of 3CX Bridge Media Player

{
  "manifest_version": 3,
  "name": "3CX Bridge Media Player",
  "version": "1.0.2",
  "description": "Play audio, video and view images from Telegram messages inline in your browser.",
  "browser_specific_settings": {
    "gecko": {
      "id": "3cx-bridge-media-player@greychain.net",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "player.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}