08282: Firefox 98.0.2: mametesters.org website dropdown menus fail on Win10 Firefox

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08282	Misc.	Major	Have not tried	Apr 2, 2022, 07:13	Apr 3, 2022, 13:42

Tester	CYBERYOGI -CO-Windler	View Status	Public	Platform
Assigned To		Resolution	Invalid report	OS	Windows 10/11 (64-bit)
Status [?]	Closed			Driver
Version	0.242	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	08282: Firefox 98.0.2: mametesters.org website dropdown menus fail on Win10 Firefox
Description	I noticed a bizarre issue on my Thinkpad X61t (Win10 version 1711 64bit, CPU=Core2Duo 1.6GHz, 4GB RAM). Its Firefox (newest version=98.0.2?, which was recently updated from 56) can not properly access the Mametesters.org website because the dropdown menus don't open. While on the first page "Welcome to MAME Testers." (https://mametesters.org/) everything still works fine, as soon I open another page (e.g. "View & Search") the dropdown menus stop working. They still light up blue when touched with the mouse pointer but don't fold out the items. Hence I also can not start a new topic in the forum because "New" does nothing. I already tried to disable various stuff in NoScript, Ghostery, the web filter of Comodo Internet Security etc. and even tried the Firefox safe mode with disabled plugins. (May there be an incompatible Firefox about:config entry? I had tweaked various stuff to reduce spyware.) On Google Chrome this site works correctly. Also on my main PC under Linux Mint (CPU=Ryzen 2400G) Firefox 98.0.2 64bit opens it without problems.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	Firefox 98.0.2

Attached Files

No.19984 Robbbert Senior Tester Apr 2, 2022, 14:18	I don't see how that's our problem. Use a browser that works.
No.19987 Augusto Tester Apr 3, 2022, 00:03	First time that I see an post about browser. if him use noscript or other plugin menus not will work.
No.19989 CYBERYOGI -CO-Windler Viewer Apr 3, 2022, 03:25	Firefox is not an exotic browser at all but at minimum the 2nd-most installed browser brand (and in many Linux systems the default)! I already had turned off plugins on X61t without effect. On Linux I always use NoScript etc. without any problems. (It only needs to manually enable script for a website that was interactively used first time.)