[Bug]: JPEG-XL library causing tab crashing on certain websites

[dajare]

Pre-Submission Checklist

• [X] I have checked the existing/closed issues to ensure this issue has not already been reported.
• [X] I am using the latest supported version of the browser.
• [X] I have tried disabling all browser extensions/add-ons to rule out interference from these.
• [X] I have tried clearing the browser cache and cookies.
• [X] I have checked with a new profile and the issue still occurs.
• [X] I have provided detailed step-by-step instructions on how to reproduce the issue.
• [X] I have included relevant screenshots or console outputs.
• [X] I have checked that this problem is not occurring in the latest version of Firefox ESR.
• [X] This issue is specific to this browser and does not occur in other browsers.

Bug Summary

When browsing the website of The Guardian = https://www.theguardian.com, I experience frequent tab crashes, with the message "Gah. Your tab just crashed. We can help!"

Reproduction Steps

1. Browse to https://www.theguardian.com
2. Load some pages, scroll around.
3. Wait for the tab to crash - n.b. it doesn't always

Expected Behavior

I expect to be able to browse smoothly, without tab crashes.

Actual Behavior

Frequently, the tab crashes.

Screenshots

n/a

Browser Version

11.20.0 (64-bit)

Operating System

Ubuntu 24.04.1 LTS

Additional Context

I do not observe this behaviour in FF 128.4.0esr (64-bit).

Note This issue has been reported to Waterfox and a fix found. It related to the setting image.jxl.enabled but I am not able to check this in Floorp, since in about:config that setting is locked.

[dajare]

I have updated the title of this bug report, as possibly the localization to The Guardian made it seem site-specific. The problem is NOT the site, it is the JPEG-XL library being used in this release of Floorp.