Describe the Bug

When opening the page (any page) Firefox shows an error in console.

Steps to Reproduce

Visit any page on demo instance, for example: https://demo.bookstackapp.com/books/bookstack-demo-site/page/logging-in-to-the-demo-site

This happens on every page and of course not only on demo instance.

Expected Behaviour

While the error seems to be harmless it might be a good idea to find the root cause and fix it.

Screenshots or Additional Context

No response

Browser Details

Firefox 117.0, Windows 11

Exact BookStack Version

v23.08.2