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FF153 Image/jxl supported in nightly#44595

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hamishwillee:ff153_jxl_image_nightly
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FF153 Image/jxl supported in nightly#44595
hamishwillee wants to merge 1 commit into
mdn:mainfrom
hamishwillee:ff153_jxl_image_nightly

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@hamishwillee

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FF143 supports the image/jxl format in nightly in https://bugzilla.mozilla.org/show_bug.cgi?id=2040074

This updates the experimental features to indicate the first version in which it appeared in nightly, and also the release note to mention the upgrade to preview.

Related docs work can be tracked in #44474

@hamishwillee hamishwillee requested a review from a team as a code owner June 29, 2026 01:07
@hamishwillee hamishwillee requested review from dipikabh and removed request for a team June 29, 2026 01:07
@github-actions github-actions Bot added Content:Firefox Content in the Mozilla/Firefox subtree size/s [PR only] 6-50 LoC changed labels Jun 29, 2026

| Release channel | Version added | Enabled by default? |
| ----------------- | ------------- | ------------------- |
| Nightly | 90 | Yes |

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Note, this may have been correct for the old xl decoder but at some point it was disabled in nightly. To reflect the actual story for use right now I have just made this enabled in 153.

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Preview URLs (2 pages)

Flaws (1)

Note! 1 document with no flaws that don't need to be listed. 🎉

Found an unexpected or unresolvable flaw? Please report it here.

URL: /en-US/docs/Mozilla/Firefox/Releases/153
Title: Firefox 153 release notes for developers (Beta)
Flaw count: 1

  • macros:
    • Macro domxref produces link /en-US/docs/Web/API/RTCDtlsTransport/getRemoteCertificates which doesn't resolve
External URLs (2)

URL: /en-US/docs/Mozilla/Firefox/Releases/153
Title: Firefox 153 release notes for developers (Beta)

To experiment with them, search for the appropriate preference on the `about:config` page and set it to `true`.
You can find more such features on the [Experimental features](/en-US/docs/Mozilla/Firefox/Experimental_features) page.

- \*\*JPEG XL image support: (Nightly): `image.jxl.enabled`

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Note, this appeared in 149 too, when the Rust decoder was added. Given that was some releases ago and this has gone into Nightly, I figure with adding again.

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