Mouse cursor frame rate randomly lowers

Windows 10 B650M PG RIptide WiFi (BIOS 3.5) Ryzen 5 7600 RTX 2060 Super (driver 596.36, output to LG C1 over HDMI at 4K 120Hz with certified cable) 16GB DDR5 This issue has been happening for about 1-2 months. When Firefox is open on my computer, my cursor will randomly lower its frame rate to a very low number, probably below 15 FPS. It doesn't matter what I'm doing, just having Firefox open, even in the background, causes this to happen. No such issues in other chrome-based browsers with or without hardware acceleration enabled. I have disabled all extensions and still encounter the problem. Disabling hardware acceleration does fix this issue, but then the web, and even high resolution videos, become laggy or choppy as a result. Which is very uncharacteristic for my system, because I remember it being quite snappy in software mode on the my same CPU in the past. So something seems to have gone wrong in recent months that makes acceleration in general poor, with or without hardware acceleration on.