I think it works well now..there where some tabs that required passwords so it kept refreshing them. I will update u if anything changes but for now like 2mins it has not auto updated anything in the background yet.

Windows 10 Pro 64bits

Not for me. The soultion u gave above of turning off auto updates works on firefox and there is no background updating going on..Why does it not work same way on opera?

Yea it might not be a but but it is distracting and not an acceptable solution. It takes away your mouse coursor while u are typing and opens multiple windows in the background which is very annoying. Surely there must be some sort of fix.

It seems to have fixed the issue on firefox but the above solution does not work on Opera browser. Any idea on how to fix that?

That seems to have fixed it so far.. I will keep an eye on it and send an update if it changes. Thanks