Mozilla Firefox 44 Beta 2今日发布，今后发布的Firefox无论Beta还是正式版都会开始支持64位系统，新版带来了新的警告页面，在证书状态异常和连接可能带来不安全的情况下会自动提醒用户，同时44版本开始支持在无法播放MP4/H.264的机器上自动切换WebM/VP9。 下载Mozilla Firefox 44 Beta 2: https://ftp.mozilla.org/pub/firefox/releases/44.0b2/ Firefox Beta 44.0 beta Version 44.0beta, first offered to Beta channel users on December 17, 2015 New Improved warning pages for certificate errors and untrusted connections Enable WebM/VP9 video support on systems that don't support MP4/H.264 Enable H.264 if system decoder is available Fixed Windows XP and Vista screensaver doesn't disable when watching videos (Bug 1193610) Changed Warning page when RC4 is the only supported cipher Firefox will no longer trust the Equifax Secure Certificate Authority 1024-bit root certificate or the UTN - DATACorp SGC to validate secure website certificates To support unicode-range descriptor for webfonts, font matching under Linux now uses the same font matching code as other platforms Use a SHA-256 signing certificate for Windows builds, to meet new signing requirements Developer Right click on a logged object in the console to store it as a global variable on the page Visual tools for Animation: View/Edit CSS animation keyframe rules directly in the inspector Visually modify the cubic-bezier curve that drives the way animations progress through time Discover and scrub through all CSS animations and transitions playing on the page Learn more: http://devtoolschallenger.com/ Visual tools for Layout and Styles: Display rulers along the viewport to verify size and position and use the measurement tool to easily detect spacing and alignment problems Use CSS filters to preview and create real-time effects like drop-shadows, sepia, etc Learn more: http://devtoolschallenger.com/ New memory tool for inspecting the memory heap Jump to function definitions in the debugger with Cmd-Click The rule view now displays styles using their authored text,and edits in the rule view are now linked to the style editor Service Workers API Built-in JSON reader to intuitively view, search, copy and save data without extensions WebSocket Debugging API and add-on Add-on signing enforcement 转载自：cnbeta.com Mozilla Firefox 44 Beta 2 发布下载地址
