Where is Firefox 4.0 was made to better compete with Microsoft Internet Explorer and Google Chrome. Sometimes the software producers will not say to the public until the software is completed to make, but slightly different Mozzila. Beltzner wrote on his blog, that works with open Mozzila, socializing their plans in advance so they can get feedback and make the whole world waiting for the presence of new technologies from Mozzila. Beltzner said in his presentation the default theme for firefox would be more simple, and fewer controls to navigate in your browser, and also fewer pixels on the browser page so that it can increase the speed when performing a search. Firefox 4 also has the ability to store data such as passwords and settings for the website frequently visited by the user. If in the previous versions, if we install the add on in your browser then we should be required to restart, it will be different with Firefox 4 this. Users can install the add on without having to restart the browser. This latest version of Firefox will also be optimized for use of the HTML5, which is the programming language used to build the website in the future. Mozzila Firefox 4.0 plans that will soon be released in october or november this year.