This document aiming Informational status updates Informational RFC 8878 (Zstandard lossless data compression mechanism) updating the window size limit of 8 MB from a recommendation to a requirement in HTTP contexts.The goal is improving interoperability, probably due to problems in field. This document does not seem to have any operational impact, neither require extra management, at best implementations should improve interoperability. From an OPS-DIR point of view it is READY.