Examine source code of FontSpark

{
  "manifest_version": 2,
  "name": "FontSpark",
  "version": "1.0",
  "description": "An art nouveau-themed extension to change webpage fonts using Google Fonts, featuring an emerald-gold interface with floral swirl animations.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c3d1cc12-1e8d-4ca9-a606-3262b95b21c7}"
    }
  }
}