Examine source code of URL Prefixer

{
  "name": "URL Prefixer",
  "description": "Adds a prefix to URLs.",
  "version": "0.1",
  "manifest_version": 3,
  "homepage_url": "https://jimjh.com",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_icon": "icon-128.png",
    "default_title": "Prefix"
  },
  "options_page": "options.html",
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{63c6feb3-cdc1-486a-9cfc-28dd2aaff7d4}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}