PT-2025-42593 · Opensuse+1 · Mozilla Firefox
Published
2025-10-07
·
Updated
2025-10-07
None
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Name of the Vulnerable Software and Affected Versions
MozillaFirefox versions prior to 140.3.1 ESR
Description
An issue was identified in MozillaFirefox where the browser would force HTTP/2 during fallback when HTTP/3 connections failed. This behavior prevented the server from selecting the protocol and caused stalls on certain websites. The update allows the server to choose the protocol, improving reliability.
Recommendations
Update to version 140.3.1 ESR.
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Related Identifiers
Affected Products
Mozilla Firefox