Examine source code of Keep Teams Awake

{
  "manifest_version": 3,
  "name": "KeepTeamsAwake",
  "version": "1.0.2",
  "description": "Prevents the Microsoft Teams website or PWA from sleeping",
  "action": {
    "default_icon": {
      "48": "icons/48.png",
      "96": "icons/96.png",
      "128": "icons/128.png",
      "256": "icons/256.png",
      "512": "icons/512.png",
      "1024": "icons/1024.png"
    }
  },
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png",
    "256": "icons/256.png",
    "512": "icons/512.png",
    "1024": "icons/1024.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://teams.live.com/*",
        "https://teams.microsoft.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "keepteamsawake@mcarr.dev"
    }
  }
}