Mozilla released Firefox 20 just two days ago, but the company has already rolled out its web browser’s beta version for Android. The new Firefox 21 beta comes with additional features such as HTML5 compatibility optimizations & open source custom fonts.

Firefox beta for Android includes custom open source fonts Open Sans and Charis. These two new fonts will substitute the default Android fonts for which the company claims “a visually appealing and clear reading experience.”

As far as the HTML5 compatibility optimizations is concerned, the beta roll out comes out with advancements to HTML5 compatibility which was tested on Mozilla now claims that Firefox for Android platform scores 411 along with 14 bonus points out of 500.

Check out the full Firefox 21 beta for Android changelog:

NEW: Shipping Open Sans and Charis fonts for Web Content.
NEW: Ability to save media files on long tap.
CHANGED: Polished UI based on Holo theme.
CHANGED: CSS -moz-user-select:none selection changed to improve compatibility with -webkit-user-select:none (bugs 816298).
CHANGED: Graphics related performance improvements (bug 809821).
CHANGED: Removed E4X support from SpiderMonkey.
DEVELOPER: Implemented Remote Profiling.
DEVELOPER: Integrated, Add-on SDK loader and API libraries into Firefox.
DEVELOPER: DOM/content implementation for <input type=’time’> Associated bugs.
HTML5: Added support for <main> element.
HTML5: Implemented scoped stylesheets.
FIXED: Download Manager page is not updated after clearing private data (777639).
FIXED: In content UI cut off on small screens (840593).

New Firefox beta for Android can be downloaded now from Google Play Store. The stable version Firefox for android is expected to be rolled out next month.