A new Firefox Beta for Windows, Mac and Linux is now available for download and testing. This update includes JavaScript improvements and adds support Retina Display for Mac users.

- IonMonkey: IonMonkey is a new JavaScript JIT compiler that provides a more efficient way for Firefox to process JavaScript. With IonMonkey, Firefox will perform faster with Web apps, games and other JavaScript-heavy pages.

- Retina Display Support: Firefox Beta supports Retina Display for Mac users to make Firefox even sharper when watching movies, playing games and browsing the Web. - Disable Insecure Content: Firefox Beta can disable insecure content on HTTPS secure websites to maintain the privacy of your communication with the website. You can enable the feature in about:config. - Support for W3C Touch Events: Firefox Beta supports standard W3C touch events in addition to MozTouch events.

Get Firefox Beta for Windows, Mac and Linux here

Mozilla has also made available a new Firefox for Android Beta. Here is what's new:

- Search Suggestions: Firefox for Android Beta suggests search terms as you type, to make navigating the mobile Web even quicker and easier. When you start Firefox you will see a box asking you to opt-in to search suggestions when you start typing into the AwesomeBar. Click "Yes" to enable. For your protection, search suggestions are conducted over a secure HTTPS connection.

- Improvements to Phishing and Malware Protection: To protect users from malicious websites, Firefox for Android Beta warns users when they encounter websites that may be used for malware or phishing. Firefox for Android Beta presents you with a warning page and allows you to exit the operation before loading a potentially malicious website.

Get Firefox Beta for Android here