[OPEN] Images in New Quizzes do not display in Firefox 127 using vanity URL


Engineers are currently investigating the issue.


When using New Quizzes on Firefox, images added through the RCE do not display and instead show the file name, this behaviour only happens when viewing the NQ using the vanity URL.

  • A cookie setting change to isolate cross-site cookies seems to be responsible.

Expected Behavior

Images should display in NQ when using either the instructure domain or the vanity URL.


Toggle the cookie settings in the privacy and security menu to no longer isolate cross-site cookies.


Steps to Reproduce

Prerequisite: A Canvas instance that has New Quizzes enabled, a Vanity URL, and the user must be using Fire Fox 127.

  1. In a Canvas course using a vanity URL, create a New Quiz and add an image.

  2. While using FireFox 127 attempt to view the image, notice only the file name displays and not the image.

Additional Info


Known issues indicate notable behaviors that have been escalated to the Canvas engineering team. Known issues are not a guarantee for an immediate resolution. This document is for informational purposes only and does not replace the Support process. If you are encountering the behavior outlined in this document, please ensure you have submitted a Support case (per your institution's escalation process) so Canvas Support can adequately gauge the overall customer impact and prioritize appropriately.

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