Firefox 44 发布，更新如下： New Improved warning pages for certificate errors and untrusted connections Enable H.264 if system decoder is available Enable WebM/VP9 video support on systems that don't support MP4/H.264 In the animation-inspector timeline, lightning bolt icon next to animations running on the compositor thread Support the brotli compression format via HTTPS content-encoding Screenshot commands allow user choice of pixel ratio in Developer Tools Fixed Windows XP and Vista screensaver doesn't disable when watching videos (Bug 1193610) Various security fixes Changed 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 Firefox has removed support for the RC4 decipher Firefox will no longer trust the Equifax Secure Certificate Authority 1024-bit root certificate or the UTN - DATACorp SGC to validate secure website certificates Stricter validation of web fonts On-screen keyboard support temporarily turned off for Windows 8 and Windows 8.1 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 Service Workers API Built-in JSON reader to intuitively view, search, copy and save data without extensions Jump to function definitions in the debugger with Cmd-Click WebSocket Debugging API and add-on The rule view now displays styles using their authored text, and edits in the rule view are now linked to the style editor 详情请看：release notes Firefox 44 发布，多项安全修复下载地址
