CompressionStream Browser Compatibility Update

[lakitu]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/CompressionStream/CompressionStream

What specific section or headline is this issue about?

Browser Compatibility

What information was incorrect, unhelpful, or incomplete?

Chrome supports zstd and brotli and has for a while. See link 1 for reference. Other browsers are also out of date.

What did you expect to see?

I expected to see Chrome brotli support since version 50, Edge brotli since version 15, Opera since version 38
Chrome zstd support since version 123, Firefox since 126.0, Brave and Edge gained support with Chromium.

Do you have any supporting links, references, or citations?

1. https://developer.chrome.com/blog/shared-dictionary-compression
2. https://en.wikipedia.org/wiki/Brotli#Browsers_and_other_clients
3. https://caniuse.com/brotli
4. https://en.wikipedia.org/wiki/Zstd#Usage

Do you have anything more you want to share?

No response

MDN metadata

Page report details

• Folder: en-us/web/api/compressionstream/compressionstream
• MDN URL: https://developer.mozilla.org/en-US/docs/Web/API/CompressionStream/CompressionStream
• GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/api/compressionstream/compressionstream/index.md
• Last commit: mdn/content@238b004
• Document last modified: 2026-04-06T02:28:31.000Z