Mozilla releases third beta of Firefox 3.1

The public preview release is intended for “developer testing and community feedback,” said the firm in a developer blog post.

Users are advised by Mozilla to read the release notes and known issues before installing the beta.

The new features include a new Private Browsing Mode, including the ability to “Forget This Site” from the History sidebar, and support for new web technologies, such as W3C Geolocation API and JavaScript query selectors.

Mozilla asked for feedback from users on the improved stability given the engine through the new TraceMonkey JavaScript and on the improved Gecko layout that gives faster content rendering.