This could be great for getting rid of all the clutter in the bookmark toolbar.

Like @Juanka Hula it would be nice to have multiples open when you mouse over rather than clicking.

Also it would be nice if we could change folder icons for each category.

But thank you, I'm finding alternatives after updating to 57 and this could replace Roomy Bookmarks.

EDIT: I found a way of adding my own icons to each folder by editing the "storage.js" file. Add your URL after "faviconUrl" for each folder.

EDIT: My folder icons get removed with an update.