Google sign-in fails with error 400 on other sites
Signing in with a Google account returns error 400 on other websites while ClearURLs is turned on.
Tier I · Proven The best-established problems.
11 public reports · first reported 22 June 2023 · last reported 10 October 2026
What's going wrong
People who use ClearURLs in Firefox report that logging in with a Google account stops working on many websites, with an error 400 page appearing at the sign-in step.
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 11 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.