Mozilla have unveiled some screenshots of the new Windows theme/UI updates for upcoming Firefox 3.7 and 4.0.

The designer and contributor to the Mozilla project – Stephen Horlander explains that the new App Button will appear in the top-left of the new UI. According to Horlander, the App Button solves a number of issues:

• It is less complex
• Takes up less space
• Instead of two potentially conflicting locations for menu items, there is now only one unified location
• Can be placed in the upper left analogous to the Menubar paradigm it is replacing
• Similar to the far more ubiquitous Office 2008/2010 + Windows 7 application menu
• Reduces clutter on the Navigation Toolbar
• It also creates a more flexible and rich canvas for perhaps doing some decidedly non-menu-esque things

Here’s a side-by-side comparison of Firefox 4.0 and the current 3.5:

A public release of Firefox 4.0 is expected at mid 2010 and the final release at the end of 2010.

Tags | Announcements, Browsers, Firefox, Internet, News