Examine source code of MS Team Quote Maker

{
  "manifest_version": 2,
  "name": "MS Team Quote Maker",
  "version": "1.3",
  "description": "Make quote on Selection (MS Team)",
  "icons": {
    "48": "icons/firefox-logo-focus-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://teams.microsoft.com/*"
      ],
      "js": [
        "borderify.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": []
}