1806525 - Unable to view jpegxl images when setting image.jxl.enabled = true in about:config

Status: RESOLVED INVALID

(Core :: Graphics: ImageLib, defect)

Description

[Troy Janda]

Attachment: jxlerror.PNG

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0

Steps to reproduce:

a) I set the pref image.jxl.enabled = true with current profile. Did not work

1. I started Firefox with a fresh profile
2. no addons or other changed settings
3. enabled only image.jxl.enabled = true
4. visited https://jpegxl.info/test-page/

Actual results:

unable to view the jxl images

Expected results:

been able to view the jxl images on the tst site with the above pref set to true in Firefox 108.0.1

Comment 1

[Troy Janda]

Other note is that with the same pref set to enable on nightly I am able to see the jxl images

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Toolkit::Add-ons Manager' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[Troy Janda]

its not an addone bugbot

Comment 4

[Troy Janda]

Attachment: jxlerror.PNG

Cound Firefox be mistakenly mixing up the type.

Comment 5

[r01opd9cujmm]

As mentioned in Bug 1539075 Comment 51:

Setting image.jxl.enabled to true has no effect on stable version, because from toolkit/moz.configure, JXL support is enabled only for Nightly builds.

Therefore, Firefox stable builds do not link to libjxl - even though you can find image.jxl.enabled in about:config, it does nothing on stable.

However, /u/antyhrabia on Reddit claims that [1], despite using the stable (108.0.1) Firefox binary built by Arch Linux [2], he can view JPEG XL images after enabling image.jxl.enabled in about:config.
In addition, according to this list [3], there is no Shield Studies related to JPEG XL.

[1] https://old.reddit.com/r/jpegxl/comments/zpynur/in_firefox_1080_stable_i_enabled_jpegxl_jxl_in/
[2] https://old.reddit.com/r/jpegxl/comments/zpynur/in_firefox_1080_stable_i_enabled_jpegxl_jxl_in/j0x45b1/
[3] https://www.jeffersonscher.com/sumo/shield.php

Comment 6

[Alex Cornestean]

Hello,

Seeing how add-ons are not involved in the occurrence of this issue, I will change the product and component of the report to a more suitable one.

In case of error, please revert the changes. Thank you !

Comment 7

[Zipdox]

Can confirm the build of Firefox in Debian sid also doesn't display JXL when the flag is enabled.

Comment 8

[Alin Ilea, Desktop QA]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:108.0) Gecko/20100101 Firefox/108.0

Hi,

I am able to reproduce the issue in release 108, beta 109 but not on the latest nightly 110.0a1 (2023-01-10) on Windows 10. Also, I can reproduce it in 102.6.0esr.

Thanks for your input.

Comment 9

[Timothy Nikkel (:tnikkel)]

jpegxl is only compiled in on nightly. the pref has no effect on beta or release.