@ keep favorites window open some where like instead of buttons view
Favorites are in many places there. You have favorites in the FolderTree, under the "Favorites".
Right click on empty space in the path field.
Or you can modify all the button in the button panel with your favorites.
@ icon with mouse over on explorer bar (where the refresh buttons is located)
I don't really understand this ?
@ favorites toolbar like firefox
I don't have FF so I don't know what special things FF do.
But you have a QuickLaunchBar where you also can drag folder and use as a "favorites bar"
@ special tab the open the folder clicked on in the other window
Special tab ? Not sure. But if you want to open a folder in a new windows, press the Middle mouse button
or Ctrl + Left/Right Arrow key (depending on if focus in the the right or left. it send the focused folder to be shown to the other side)