Limited Availability

Compression Dictionary Transport

Compression Dictionary Transport is a mechanism for using designated HTTP responses as an external dictionary for future HTTP responses for compression schemes that support using external dictionaries (e.g., Brotli and Zstandard)

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on Oct 17, 2024.

Desktop Browser Engine Support

Google Chrome

130

Supported

Mozilla Firefox

—

Unsupported

Apple Safari

—

Unsupported

Microsoft Edge

130

Supported

Mobile Browser Engine Support

Chrome Android

130

Firefox Android

—

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

html.elements.link.rel.compression-dictionary ↗ http.headers.Accept-Encoding.dcb ↗ http.headers.Accept-Encoding.dcz ↗ http.headers.Available-Dictionary ↗ http.headers.Content-Encoding.dcb ↗ http.headers.Content-Encoding.dcz ↗ http.headers.Dictionary-ID ↗ http.headers.Use-As-Dictionary ↗