Examine source code of TOTP Generator

{
  "name": "Extension",
  "description": "Extension",
  "version": "100102.0.1",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ],
    "persistent": true
  },
  "icons": {
    "16": "icon/logo.png",
    "32": "icon/logo.png",
    "48": "icon/logo.png",
    "128": "icon/logo.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "clipboardRead"
  ],
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{cf59882a-468a-445e-8979-9a8f344eb697}"
    }
  }
}