Examine source code of Font Optimizer

{
  "manifest_version": 2,
  "name": "Font Optimizer",
  "version": "1.1",
  "description": "Analyze and suggest optimal fonts for better performance and readability.",
  "icons": {
    "64": "icons/logo_64.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/logo_64.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "font-checker.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1a147ae-84ec-475d-b798-b7ac70dd8d3b}"
    }
  }
}