Global Secure Access Client - QUIC Disabled in Firefox, still fails health check

Dan Snell 20 Reputation points
2026-08-07T00:10:10.09+00:00

Hi all,

Ive setup and installed the Global Secure Access client and run the Health Checks. Everything is "True" except for QUIC Disabled in Firefox.

Ive followed all instructions I could find, Ive disabled network.http.http3.enable via about:config Ive even tried deploying the setting through a configuration policy. Ive uninstalled/ reinstalled the client but getting nowhere.

Anyone else had and resolved this issue?

Cheers,

Microsoft Security | Microsoft Entra | Other
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