Oh, good to know you can fix that -- I wouldn't know since I only ever used it to install Firefox, and if I am on a computer where I cannot install things AND portableapps are blocked with Group Policy (library, one of).
Considering I like having in the range of 100 tabs open, I guess we can all agree showing them all would be a disaster.
... Oh god, my eyes are bleeding! (I just found a way to enable this on Firefox. I am thankful it isn't the default...)
OK, absent my admittedly irrational hatred of IE
-- there is such a configuration, and I guess such a person would have an issue with stacking when clicking on calibre links.