JS TypeError in Firefox #4170

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OVERLORD · 2026-02-05T08:12:03+03:00

OVERLORD commented

2026-02-05 08:12:03 +03:00

Originally created by @aldem on GitHub (Sep 11, 2023).

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

Originally created by @aldem on GitHub (Sep 11, 2023). ### Describe the Bug When opening the page (any page) Firefox shows an error in console. ![image](https://github.com/BookStackApp/BookStack/assets/754722/4609a9d4-f897-42ce-80fa-2b3a5b577cf8) ### 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

OVERLORD added the 🐛 Bug 💻 Front-End labels 2026-02-05 08:12:03 +03:00

OVERLORD closed this issue

2026-02-05 08:12:04 +03:00

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Reference: starred/BookStack#4170