I support this idea and one thing is also seems to be essential - when you search for a bookmark, let it folder path be displayed in adjacent column or in hint balloon maybe.Why this can be very useful is because I have had so many times when managin...
There are Tree Style tab extension that does grouping and you can put it on the side. Used it for several years and love it.And if you need to keep pages open just for a reference, it may be a better idea to use specialized knowledge keeping software...
