Description of problem: when jumping around various tabs or hovering over markdown menus (bookmarks, icons, etc), Firefox may come to a stall, freezing my system.


Version-Release number of selected component (if applicable): firefox-81.0.1-5.fc33.x86_64


How reproducible: unknown, but has happened 3 times since upgrading to fedora 33.


Steps to Reproduce:
1. run firefox in fullscreen, jump between window/tabs, bookmarks and hover over them or plugin icons with your mouse cursor.
2. eventually you'll trigger it; if not a system freeze, then an application crash or strange things happen; bookmarks scroll menu going outside of your window or not opening at all, etc.


Actual results: as soon as i saw my mouse cursor hover over one of my plugin icons and it changed colored (as in being highlighted) my system froze.


Expected results: no interruptions or having to hard reset your system.


Additional info: gnome/wayland, latest mesa 20.2 drivers.


01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] (rev e7) (prog-if 00 [VGA controller])
	Subsystem: Micro-Star International Co., Ltd. [MSI] Device 3417
	Flags: bus master, fast devsel, latency 0, IRQ 138
	Memory at c0000000 (64-bit, prefetchable) [size=256M]
	Memory at d0000000 (64-bit, prefetchable) [size=2M]
	I/O ports at e000 [size=256]
	Memory at dfe00000 (32-bit, non-prefetchable) [size=256K]
	Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: amdgpu
	Kernel modules: amdgpu