This beta 5 is far better than the previous one when you use the Firefox + Eset combo, however there are still some problems. There are some instabilities from time to time, when the Firefox window takes up to a minute to react to the close/minimize/maximize buttons. There are also -some- files that are downloaded corrupted or empty if DisplayFusion is active (mods from the Nexus, updates for YoloMouse...). If DF is off or if I use another browser (edit: same problem with Brave), no problem with the same downloads. That download problem was already present with the previous beta.

I am still having issues with Displayfusion and Firefox browser, but I can say that in my case it definetly is linked to Stardock software. I have tried it with Start11 v2 , and with the newest beta of Fences 6. If either of those is installed, the browser gets slowed to a crawl, eventually becoming unresponsive altogether. Uninstall them, and the system works perfectly.
Attaching Displayfusion log . Starts at 11:01 and runs until 11:03 .