Mozila has scheduling to release Firefox 4.0 this year. It can be used on Windows, Mac and Linux operating systems. The new function introduced in this browser is GUI a users can install different themes to change the look of their browser. Firefox 4.0 also has multi touched gesture support. There is an indication that firfox 4.0 will see 64bit browser appearing. Firefox scheduled to use Gecko 1.9.4 rendering engine.
Screen Shots below;
