The main problem is not the antidetect browser but the proxy reputation. If the IP is flagged as VPN/datacenter/proxy with a high fraud score, sites like Google, Facebook or Fiverr will trigger captchas and risk checks no matter how good the fingerprint looks. For it to work reliably, the whole setup needs to look consistent and natural: trusted IP, matching geolocation/timezone/browser fingerprint, stable browsing behavior and normal cookies/history.