The latest beta for Firefox 4 has been released by Mozilla, this makes it the Third beta for the Firefox 4 development. Beta three supports 30 languages and also supports multi-touch on Windows 7. This gives users the ability to interact with the browser without the need for a mouse. Several changes have been made to JavaScript to give a faster and more streamlined experience.

The C++ representation of JS has also been changed in Beta 3, which allows the browser to execute numeric code more efficiently. This means more streamlined graphics in web applications.

Mozilla has included a feedback add-on in the beta, giving users the ability submit bugs and errors as they come across them. Mozilla has said that the feedback add-on has received 3,500 reports a day from over half a million testers. An extra stat also shows that the majority of testers for Firefox beta are male, and use the web for between 2-6 hours a day. They primarily use Firefox for entertainment and communication.