The sidebar feature (for mozilla, opera ...) is very
cool but i many case this panel is just use to see the
links and when we want to modify/add/remove link, we
use the main page.
So, it will be interesting to have the possibilty to
insert a tabbar with a lite version of bookmark (it
means just the tree (dynmaic) of the bookmark).
So bookmark4u is a very good tools, congratulations.