Examine source code of Base Converter

{
  "manifest_version": 2,
  "name": "Base Converter",
  "version": "1.0",
  "description": "A base conversion calculator.",
  "homepage_url": "https://fromtotools.com/",
  "icons": {
    "48": "icons/icon_48.png"
  },
  "browser_action": {
    "default_icon": "icons/icon_192.png",
    "default_title": "Base Converter",
    "default_popup": "base_converter.html"
  },
  "sidebar_action": {
    "default_panel": "base_converter.html",
    "default_icon": {
      "16": "icons/icon_16.png",
      "32": "icons/icon_32.png"
    },
    "default_title": "Base Converter"
  },
  "content_security_policy": "default-src 'self'",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{82408ee7-264a-41be-b4db-5630918ce0a6}"
    }
  }
}