两天前Mozilla刚发布了Firefox 20的Android版，但Beta频道的21版本已经推出，新版本增加开源自定义字体Charis特性和HTML5兼容性优化。Mozilla用新的字 体取代了Android的原生字体，带来了更佳的阅读体验，而HTML5兼容性的改进让HTML5test评分提高到了411(共500分)。 以下是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). 可以从Google Play Store直接下载到Beta版本，正式版预计今年5月发布。
