Examine source code of LY Video Tool

{
  "manifest_version": 3,
  "name": "video tool",
  "version": "1.0",
  "description": "video dom tool",
  "icons": {
    "32": "img/32.png",
    "64": "img/64.png",
    "128": "img/128.png"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "run_at": "document_end",
      "js": [
        "inject.js"
      ],
      "css": [
        "inject.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "video_tool.ffp@61linux.com",
      "strict_min_version": "109.0"
    }
  }
}