[coldtea]

List of folders:

+ user is able to see a tree-view / list of them all at one.

+ searchable.

+ loadable on demand on the same "tabs", even whole folders (projects) at once.

+ persistent (even across computers with bookmark sync).

+ doesn't waste memory (not even mininal).

+ Was even designed for actual organization (Manage Bookmarks...), instead of a viewing content feature that was abused for that purpose.