It seems Mozilla is planning to change Firefox UI in upcoming versions most probably Firefox 8.0. "Stephen Horlander" has shared some interesting UI mockups of Mozilla Firefox named "Australis" at Mozilla People website.
The mockups have been created for Mac OS X and Windows 7. Some interesting mockups are as following:
Mac OS X:
Windows 7 Maximized:
You can take a look at other mockups at following link:
What do you think about these new mockups? Like it? Do you also think these mockups look similar to Google Chrome?
PS: If you want to enjoy this mockup UI, check following article: