Did you have telemetry disabled? It sounds like users with telemetry disabled were not affected. EDIT: https://bugzilla.mozilla.org/show_bug.cgi?id=1749908#c1

Did you have telemetry disabled? It sounds like users with telemetry disabled were not affected. EDIT: https://bugzilla.mozilla.org/show_bug.cgi?id=1749908#c19 https://bugzilla.mozilla.org/show_bug.cgi?id=1749908#c19 this is seemingly not the case, other HTTP/3 services can also trigger the same bug, telemetry just happens to be the most common / first to be triggered