Examine source code of Teams Online

{
  "manifest_version": 2,
  "name": "Teams Online",
  "version": "1.0",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://teams.microsoft.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "description": "Mantém o Teams PWA sempre online",
  "icons": {
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "teamsonline@example.com",
      "strict_min_version": "91.0"
    }
  }
}