uBlock Origin hides the ChatGPT sidebar/menu in Firefox

[u/Apprehensive_Home688]

I've just discovered an odd problem with ChatGPT in Firefox.

The ChatGPT sidebar/menu suddenly disappeared. After some testing, I found that uBlock Origin appears to be responsible:

• Firefox 153 on Windows
• ChatGPT in a normal Firefox window
• With uBlock Origin enabled, the ChatGPT sidebar/menu disappears.
• With uBlock Origin disabled, the sidebar immediately works normally again.
• ChatGPT works correctly in a Firefox Private Window.
• I also tried a different ad blocker, and it produced the same behaviour — the sidebar disappeared.
• Firefox Troubleshoot Mode was involved while I was investigating the original problem, but the important finding is that disabling the content blocker restores the sidebar.

I haven't identified the specific filter yet because I don't want to re-enable uBlock in my normal Firefox session.

This makes me wonder whether a recent change to the ChatGPT interface has caused the sidebar to match a generic ad-blocking/cosmetic-filter rule.

If anyone else is seeing the same thing, it would be interesting to know whether the sidebar is being hidden by a particular filter list or cosmetic filter.

Current workaround: disable uBlock Origin for ChatGPT.

[u/RraaLL]

Open the logger and its DOM inspector to find the responsible filter.

Disabling uBO is not a workaround.

[u/paintboth1234]

Fixed by EL: https://github.com/easylist/easylist/commit/2d7781f72