Examine source code of Auto Webpage Redirect

{
  "manifest_version": 2,
  "name": "Auto Redirect Webpage",
  "version": "1.0",
  "description": "Automatically redirects target webpages to a specified destination",
  "icons": {
    "48": "./icons/icon.svg"
  },
  "browser_action": {
    "default_title": "Auto Redirect Webpage",
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "applications": {
    "gecko": {
      "id": "url-auto-redirector@example.com"
    }
  }
}