Examine source code of Better MS Teams

{
  "manifest_version": 2,
  "name": "Better Teams",
  "short_name": "Better teams",
  "version": "0.5",
  "author": "Harry",
  "description": "Making web sites work better for us",
  "icons": {
    "16": "upDown16.jpeg",
    "48": "upDown48.jpeg",
    "128": "upDown128.jpeg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://teams.microsoft.com/*"
      ],
      "js": [
        "jquery-3.7.0.min.js",
        "content.js",
        "jquery-ui.min.js"
      ]
    }
  ],
  "content_security_policy": "script-src 'self' https://ajax.googleapis.com  'unsafe-eval'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2855468b-107f-46b1-9476-25904b067cfc}"
    }
  }
}