Examine source code of Google Font Live Preview

{
  "manifest_version": 3,
  "name": "Google Font Live Preview",
  "version": "1.0.1",
  "description": "Pick a Google Font. Choose a CSS selector. See what your website looks like with that font.\nNo more _copy paste Google Font embed URL_ → _add to code_ → _realize it doesn't look good_ → _copy new embed URL_ → _add to code_...you get it :)",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "https://fonts.googleapis.com/*",
    "https://fonts.gstatic.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Font Changer"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "dav.is@zohomail.in"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "defaultFonts.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}