@marbaa I'm going to assume that this isn't a virus. I would go to the startup section in settings to see if this is the issue. 'Continue where you left off' is the Default(I think?), but someone might have changed it to 'open new tab.'
@cjc2112 No, that is not a virus. Happens on desktop and corporate work notebook. I have set 'Continue where you left off'. Tried to set 'Open new tab' do some tests, then set back to 'Continue..', didn't helped.