Examine source code of Dark Mode for Google Meet

{
  "manifest_version": 2,
  "name": "Dark Mode for Google Meet",
  "author": "danic",
  "version": "1.6",
  "permissions": [
    "*://meet.google.com/*"
  ],
  "content_scripts": [
    {
      "js": [
        "meet.js"
      ],
      "run_at": "document_end",
      "matches": [
        "*://meet.google.com/*"
      ],
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "icons": {
    "32": "icons/logo.png",
    "48": "icons/logo.png",
    "64": "icons/logo.png",
    "96": "icons/logo.png",
    "128": "icons/logo.png",
    "256": "icons/logo.png"
  }
}