In the main window of Power Favorites you are able to add new bookmarks or synchronize them with your del.icio.us account 

Using tools menu you can check for duplicates or the dead links, set an online del.icio.us account, etc 

The program's options allows the user to sign in with his username and password and to define the hotkey for the app's main window 

In Browser tab you can see the currently installed browsers and you are able to modify their bookmark file