Continuing the development of the eagerly anticipated Firefox 4, a second beta release has been made. The releases are intentionally released often to have a better and up-to-date testing experience for those involved.

Although it remains a beta, it is interesting to see how Firefox 4 matures to a stable release this year. Presently it's not recommended for normal end users to use this build for daily purposes, but it is safe to take a look at what is to come.

As usual with betas, the changes are numerous:

• Firefox 4 Beta 2 is available in 24 languages.
• Tabs are now on top by default on Windows and OSX - Linux will be changing when the theme has been modified to support the change.
• You can turn any tab into an "App Tab" by right-clicking on it and selecting "Make into App Tab" from the context menu.
• Web developers can animate content using CSS Transitions.
• Responsiveness and scrolling improvements from the new retained layers layout system.
• JavaScript speed improvements due to engine optimizations.
• Changes to how XPCOM components are registered in order to help startup time and process separation.

You can find the entire release notes of this and the previous beta release at Mozilla's site. If you like new web stuff than this Firefox 4 build will make you happy. Remember to give your feedback once you've downloaded and installed it.