Since the update I have had problems also but not browser problems.
My thoughts for you are to explore your computer’s power settings and avoid sleeping or screen savers.
My problems were based on keeping windows from sleeping so that my security camera would upload video on Onedrive.com
Resolved all but one of my problems by using Device Manager to keep all Human and wireless devices from sleeping and re positioning my USB cords to different ports as Windows 10 update seems to affect USB 2.0 usb ports incorrectly.
My final problem now and was that while my video upload problem has gone I still have the computer being in and endless loop heating up the computer and preventing any input from keyboard or mouse. This maybe happening when the monitor shuts down as it does not happen now from the screen saver timing.
I am looking on this thread to address it.
https://superuser.com/questions/1153162/how-do-i-stop-windows-10-going-to-sleep-after-locking-with-winl-key
I fixed my problem with changing a value in registry that was causing the Cortana high CPU/Memory usage.
https://www.windowscentral.com/how-fix-high-cpu-usage-after-installing-update-kb4512941-windows-10
All’s well now.
Windows to turn off.." for all such. This may help. Caffeine is a free and portable tool which can prevent your PC from going into sleep mode.