Firefox 3 Beta 5 is a developer preview release of Mozilla’s next generation Firefox browser and is being made available for testing purposes only. These beta releases are targeted to Web developers and the testing community to gain feedback before advancing to the next stage in the release process.

Firefox 3 Beta 5 includes more than 750 changes from the previous beta, improving stability and web compatibility, providing platform and user interface enhancements, and resulting in the fastest Firefox ever. Many of these improvements were based on community feedback from the previous beta.

Mozilla provides Firefox 3 Beta 5 for Windows, Linux, and Mac OS X in a variety of languages. You can get the latest version of Firefox 3 Beta 5 here.

Microsoft has released a public beta for Internet Explorer 8. This release is intended to help web designers and web developers prepare for the upcoming version of the browser.

Some of the most important features for developers are the improved compatibility and interoperability and the new developer toolbar which enables developers to quickly debug HTML, cascading style sheets, and JavaScript in a visual development environment. Other improvements are the full integration for cascading style sheets, version 2.1 as well as the HTML improvements like the separate URL handing for attributes.