Examine source code of Brain Redirect

{
  "manifest_version": 2,
  "name": "Brain Redirect",
  "version": "0.2",
  "minimum_chrome_version": "74",
  "description": "Redirects pages from bracklists to challenge sites and redirects back after finishing challenge.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{ddb5a590-17de-4457-bafb-9e34b3885d24}",
      "strict_min_version": "67.0"
    }
  },
  "icons": {
    "48": "/icons/redirect48.png",
    "128": "/icons/redirect128.png"
  },
  "permissions": [
    "webRequest",
    "<all_urls>",
    "storage",
    "alarms",
    "webNavigation"
  ],
  "options_ui": {
    "chrome_style": true,
    "browser_style": true,
    "page": "/options/options.html"
  },
  "background": {
    "page": "brainredirect.html"
  }
}