URL: https://www.udemy.com/

Browser / Version: Firefox 118.0
Operating System: Windows 10
Tested Another Browser: Yes Other

Problem type: Site is not usable
Description: Missing items
Steps to Reproduce:
The drop down menus/options that should appear when the mouse cursor hovers the options on the header (like "Categories" or if you are logged into the web the Student menu) doesn't appear on Firefox 118.01 (64bits) Windows 10 PRO.

Sometimes they work but after a restart of the browser they stop working again.

I tried the following to see if there were any change but without success:

• Clear Site data (cache and cookies)
• Use Troubleshoot mode
• Create and use a new profile
• Refresh Firefox
• The suggestions in this article https://support.mozilla.org/en-US/kb/websites-look-wrong-or-appear-differently

I tested the site using the browser Brave Version 1.58.135 Chromium: 117.0.5938.140 (Official Build) (64-bit) and the site works normally.

I also tested the site using a Firefox 118.0.1 (64-bit) in an Ubuntu Virtual machine on the same computer and in that case the site works as expected (the menus appear when the mouse hovers over the options)

View the screenshot

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