Mozilla has been working on an interface redesign of its Firefox web browser for a very long time. The idea was to improve the interface in many regards, make it modern and comfortable to use at the same time. The Firefox engineers responsible for the new interface -- named Australis -- did not only change the look of the browser chrome, but also tried to declutter the interface, by removing parts of the interface or moving them to another location in the browser window.
Here's the list of some of the major changes in new interface:
1. Tabs can only be placed on top.
2. There is no add-on bar anymore, which means that add-on icons can only be placed in the main Firefox toolbar or the tab bar.
3. The new Customize menu does not display nearly as many options as the Firefox button did.
4. The new Bookmarks icon cannot be separated anymore.
5. There is only one icon size for all icons. The option to use small icons, to display icons, text or icons with text has been removed as well.
6. The reload button is now displayed on the right of the address.
7. The menu bar, while still there, cannot be home anymore to custom entries.
8. Some interface elements can only be moved or removed together. The forward and backward buttons are now tied to the address form, as it the previously mentioned bookmarks star and menu. What this means is that you cannot move the forward button anymore, or the bookmarks menu icon (without moving the bookmarks star as well).
Source: Ghacks.net
