Examine source code of Website Beautifier

{
  "manifest_version": 2,
  "name": "Website Beautifier",
  "version": "1.0",
  "description": "Improves the usability of a specific website by applying custom styles to certain UI components.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "https://example.com/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://example.com/*"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d1cd930b-47a1-4948-848a-f6d8019c749f}"
    }
  }
}