Examine source code of FontBlitz - Font Changer

{
  "manifest_version": 3,
  "name": "FontBlitz - Font Changer",
  "version": "1.0.0",
  "author": "Filip Vitas",
  "description": "A browser extension for instantly switching and testing fonts on any website.",
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "FontBlitz",
    "default_icon": {
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "service-worker-loader.js"
    ],
    "type": "module"
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "tabs",
    "scripting",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@fontblitz.com",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}