The behavior of the beforeunload event has changed such that calling preventDefault in a beforeunload event handler triggers a confirmation dialog. If your network uses a middlebox that inspects network traffic and/or you previously encountered issues with the ZSDCH feature, review the Considerations for zstd-based Shared Dictionary Compression for HTTP page which contains updated guidance.īehavioral changes to the beforeunload event. A version of the Compression Dictionary Transport feature is available for sites to use by participating in the associated origin trial. Feature updatesĬompression Dictionary Transport support. Stable channel security updates are listed here.
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