Examine source code of Teams Stay Active

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "version": "1.0.0",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "action": {
    "default_popup": "popup.html",
    "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"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a1a1a1a1-a1a1-4274-98bf-a3e1a7f195a1}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://teams.live.com/*",
        "https://teams.microsoft.com/*",
        "https://teams.microsoft.us/*",
        "https://dod.teams.microsoft.us.mcas-gov.us/*",
        "https://teams.microsoft.com.mcas.ms/*",
        "https://teams.cloud.microsoft/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}