Mozilla has decided to provide full service to the users of Android by making various changes. To that end, Firefox uses XUL created a multiplatform toolkit for designing widgets and various elements in the user interface. However, the toolkit will be used in the Java programming language is more simple and lightweight.
This will bring changes not only in the view and different experiences, but also will speed up load time and performance. This change also will make Firefox display looks like the applications you normally use in Android, and of course will further customize the look of Ice Cream Sandwich.