[detaro]

Why is "a list of bookmarks grouped by folders" organized, but "a list of tabs grouped by windows"(potentially with the support of tree style tabs or something similar) crazy and messy?

[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.