Examine source code of ToXCancel

{
  "manifest_version": 3,
  "name": "ToXCancel",
  "version": "1.3",
  "description": "Redirect to xcancel.com when the browser is on x.com",
  "icons": {
    "48": "icons/toxcancel-48.svg"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "*://*.x.com/*",
    "*://*.twitter.com/*"
  ],
  "background": {
    "scripts": [
      "toxcancel.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{135c3428-66bc-4b5b-9503-282dc00802e7}"
    }
  }
}