Soldato
I'm actually starting to see this now as well. Sometimes it's instant and fluid, sometimes it feels like the system is freezing for a split second. It's been hard trying to find the cause of this (I tried reverting everything to stock, different GPU driver, BIOS update, RAM XMP profile off, check disk, etc). Everything was fine a week ago. Also notice it affects Firefox too when opening a page in a new tab, sometimes the split second freeze happens there. Chrome and Edge seems fine though. Another thing I noticed recently happening is the Windows shield notification takes a good couple of minutes to become a green tick as well after boot up.
This is only happening with my desktop though (in sig). My Surface Pro 4 and work PC with the same updates seems completely fine.
We both seem to have Ryzen based PCs with the 1080Ti, perhaps the issue lies somewhere there?
Possibly I've removed software that I thought would be possibly causing the issue but made no difference, Everything was fine upto roughly a week ago when I first noticed it, I too get the same as you on Firefox even tried a temp basic profile incase it was an addon causing the fault and made no difference.