Cloudflare challenges loop when UA spoofing is on
Spoofing the user agent makes Cloudflare challenges loop or fail, so sites behind Cloudflare stop loading.
Tier I · Proven The best-established problems.
15 public reports · first reported 5 January 2023 · last reported 3 October 2026
What's going wrong
Users of this User-Agent Switcher say that with the add-on enabled, sites protected by Cloudflare either refuse to load or trap them in a captcha loop that never resolves.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 15 reports are about, and how many came each month.
- Related problems.
No business has been found with this problem yet, so the report has no contacts. All sales are final — no refunds. Pricing.