The latest trunk builds of Mozilla Firefox now feature the redesigned Options/Preferences window that has been developed over the last few weeks. Most noticeably, the new window moves the category icons from the left side of the window to the top. The number of category icons has also been increased: a new Tabs category contains the tabbed browsing preferences formerly located in the Advanced category. In addition, the Web Features category has been renamed to Content. Some of the settings have been moved around as part of the redesign so you may have to do a little hunting to find your favourite option.
Link: Mozillazine
