With Firefox 3.5 barely out the door, the Mozilla team is already working on Firefox 3.7, which is expected to have a brand new user interface, tweaked for Vista and Windows 7 Aero.

Below is an initial mockup of Firefox 3.7 running in Windows Vista, with features including:

  1. Embracing Glass: Toolbar and Tabs using Glass. Buttons translucent and slightly glossy to meld with the toolbar. Raised 3D look achieve tactile “feel”.
  2. Page Button: Connect the Page button to the left side of the tab area. Directly connected to the Page.
  3. Tools/Bookmark Bar: Connecting the Tools button to the side of the Window to emphasize the fact that it is used for customizing and changing the UI. Adding a button next to that to toggle the Bookmarks Bar which is turned off by default.

Firefox 3.7 on Windows Vista

More screenshots are after the break.

Firefox 3.7 on Windows Vista without AeroFirefox 3.7 on Windows XP