Q: How do I make all my folders open in the same window, when browsing the file system?
A: If you want to set the file manager so that it doesn’t open a new window for each folder, you can follow these steps:
Double-click on the “Computer” icon on your desktop.
Go to the “Edit” menu and choose “Preferences.”
Click on the “Behavior” tab.
Put a check in the box marked “Always open in browser windows.”
(Thanks to Eugéne Roux for this method of doing it! And thanks to Raivis Dejus for a better phrasing of the question.)
via: www.fedorafaq.org