Firefox 10 launched today as a silent update so as not to disturb intrepid Web users.

The update, as we reported yesterday, brings new features to the browser, but nothing worth celebrating over.

The update features extension improvements with most extensions that work on Firefox 4 working on Firefox 10. It includes support for full-screen Web apps and anti-aliasing for WebGL applications.

Firefox 10 also debuts the new “Extended Support Release” for businesses. This allows the browser to only download necessary security updates so businesses no longer have to deal with a new browser update every six weeks. The ESR version will change every seven releases, so November will be the next update for those users.

For those unaware, Firefox changing versions so rapidly is due to Chrome being on the same release schedule. While Internet Explorer is still the most used browser on the Web, Chrome and Firefox are battling neck-and-neck for the number two spot. The sped up release schedule is helping Firefox remain competitive.

Firefox 10 will be released as a silent update to current users today. If you haven’t used Firefox yet, now is a good time to try it out. It’s available for Windows, Mac and Linux today.