The new default behaviour is awful -- I've been aware of it for some time, but didn't fully appreciate how much of a mess it made until I had to clean up my downloads directory today. It's a massacre in there; I have to individually preview cryptical...
I have a related idea: smart extension icon visibility.I have a lot of extensions which modify content on specific websites. I want to have their icons available in the toolbar so that I can trigger actions or access options while I am on those sites...