Examine source code of Base Converter

{
  "manifest_version": 2,
  "name": "Base Converter",
  "version": "532",
  "description": "Convert numbers between binary, octal, decimal, and hexadecimal. Shows ASCII/Unicode character for single values.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{7039a26b-db04-4ab1-85bf-621771912120}",
      "strict_min_version": "96.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "static/icon16.png",
      "32": "static/icon32.png",
      "48": "static/icon48.png",
      "96": "static/icon96.png",
      "128": "static/icon128.png"
    },
    "default_title": "Base Converter",
    "default_popup": "app/popup.html"
  },
  "icons": {
    "16": "static/icon16.png",
    "32": "static/icon32.png",
    "48": "static/icon48.png",
    "96": "static/icon96.png",
    "128": "static/icon128.png"
  },
  "permissions": [
    "clipboardWrite"
  ]
}