HTTP/3 issue affecting R2 custom domains

Summary

HTTP/3 issue affecting R2 custom domains

This incident has been resolved.

• Started

  Aug 31, 2026 · 6:47 PM

• Resolved

  Sep 3, 2026 · 7:32 PM

• Duration

  3d 45m

• Severity

  Minor

• ◐

  Investigating

  Aug 31 · 6:47 PM Cloudflare

  Some Firefox users may see delayed or failed asset loads on R2 custom domains due to an incorrect HTTP/3 advertisement. We are working on a fix.

• ◆

  Identified

  Sep 1 · 2:46 PM Cloudflare

  The issue has been identified and a fix is being implemented.

• ◉

  Monitoring

  Sep 3 · 3:14 PM Cloudflare

  A fix has been implemented and we are monitoring the results.

• ✓

  Resolved

  Sep 3 · 7:32 PM Cloudflare

  This incident has been resolved.