Interesting... My setup is with laptops, a dock, and external monitor and I have never had this issue in Windows or Linux. You should really post a video showing the issue. Do you have the same issue with Firefox in Safe Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-4troubleshoot-modesf5safe-modesf Are you running Windows Pro or Home version?

Hi Jonzn4SUSE!

Many thanks for your response. I appreciate it!

I am using a laptop with an external monitor as an extended screen.

I have not previously experienced this issue before today and I only use Mozilla.

I recently upgraded to the 113.0.2 update.

The issue remains present in Safe Mode.

If Firefox is started on the external monitor, which is the primary monitor, Firefox works fine if it's kept on that monitor. If it's moved to the laptop monitor then it is unable to be interacted with - for example, if I attempt to click on the browser it is as if the browser doesn't exist - it selects objects / panes behind it.

If Firefox is started on the laptop monitor, it has a high white solid 'bar' across the top which obscures half of the bookmark bar and the browser is not able to be interacted with. If the browser is then moved to the external monitor, the browser works without a problem.

I use Windows 10 Pro.

No other issues present themselves on the laptop monitor - I can use Chrome on it without an issue and GPU-required activities don't display any issues.