Examine source code of Microsoft Teams Enhancer

{
  "permissions": [
    "storage",
    "clipboardWrite",
    "clipboardRead",
    "https://teams.microsoft.com/*",
    "https://*.teams.microsoft.com/*"
  ],
  "description": "Unofficial extension adding compact UI, smart message copying, plain-text paste, and context menus to Microsoft Teams.",
  "manifest_version": 2,
  "version": "2.3.0",
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "name": "Microsoft Teams Enhancer",
  "browser_specific_settings": {
    "gecko": {
      "id": "@teams-enhancer",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://teams.microsoft.com/*",
        "https://*.teams.microsoft.com/*",
        "https://teams.cloud.microsoft/*",
        "https://*.teams.cloud.microsoft/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}