I am currently unable to access addons.mozilla.org as an add-on developer.

Add-ons
1

The site returns:

Error 503 Backend.max_conn reached
Backend.max_conn reached
Error 54113
Details: cache-bfi-krnt7300043-BFI 1788911551 2406634540
Varnish cache server

Date: September 9, 2026

This appears very similar to the AMO outage reported on August 20, 2026:
“Addons.mozilla.org is returning HTTP 503 – Backend.max_conn reached when accessing the Firefox Add-ons application.”

2

Hi there!
We indeed had an incident that should already be resolved!

Could you please check again and let me know whether your access has been restored?

-Christos

4

Indeed, the issue is gone, everything works perfectly! Thanks!