Stop changing its behaviour by default
PLEASE! When you make a so-called "improvement" DON'T make it default to new behaviour. Include that new feature as an option, but don't force me, in the middle of my work day, to suddenly have to cope with unexpected behaviour and then spend all kinds of time researching how to REMOVE what you have just done to it. You just made it default to using tabs instead of new windows, and I am BEYOND frustrated! For those who want that...fine, but don't force me to use that so-called feature. It's not a feature for me. I have to have two PDF's open at the same time so I can drag pages over, and that won't work with tabs. I have just wasted over half an hour of my work time trying to figure out how to fix it back to functional. GEEEZ people! Stop screwing with something that works just fine and penalizing those of us who are used to using it the way it is.