Mozilla adds App Tabs to Firefox

Mozilla's Firefox browser now has a feedback button

Mozilla has released the latest beta of Firefox 4 to the company's early adopter community.

Firefox 4 beta 2 includes a number of improvements, and is now available in 23 languages. The firm credited its global community of users with much of the work towards achieving this.

Tabs have been improved, and the firm said that from now they could be turned into App Tabs, meaning that users can switch between applications, for example an email client, as easily as they change web pages.

Mac and Windows users will find their tabs located at the top of the page, the firm added, which should make it easier to navigate and control their web experience.

Windows users, specifically those running Vista and XP, will also find the menu bar replaced with a single button. Mozilla said that this would let them access their most used options with "just one click".

Developers too have had their options increased. The latest beta includes support for new CSS3 features. In its release notes Mozilla said that this would let designers add "elegant animations" to their sites.

Improved "retained layers" features will help improve scrolling on complex sites, it added.

Testers will start receiving automatic updates soon, and Mozilla is keen for all users to make the most of its feedback button - a new feature in the browser.