KBrowser Sidebar gives you access to a number of information trees in your browser. You can access the sidebar by clicking on the first icon “toggle sidebar” in your side-toolbar.
Bookmarks: This is the Firefox favorites tree. You can drag links from here and pin them as page tabs. A good way to transfer your bookmarks to KBrowser
History: This is the Firefox history. You can drag links from here to create new page tabs.
Portal Tree: This is an index of your Panel/Group/Page tabs. You can access your tabs from here, create new Portals and move or copy tabs between groups and Portals
Optimal Bookmark Tree: This tree stores all of your Bookmarks, RSS and Curation Folders. Every Page tab is linked to a folder in this tree. You can have one or more pages linking to the same folder in this tree.
Page Tree: Once you grow your folder list and have large nested folder trees, you can use this view to isolate your nested folders.
Curation Tree: This tree lets you build curation files to be exported for web viewing.