版本历史 Mozilla Firefox 28.0

What’s New

• NEW  VP9 video decoding implemented
• NEW  Mac OS X: Notification Center support for web notifications
• NEW  Horizontal HTML5 audio/video volume control
• NEW  Support for Opus in WebM
• CHANGED  Now that spdy/3 is implemented support for spdy/2 has been removed and servers without spdy/3 will negotiate to http/1 without any penalty
• DEVELOPER  Support for MathML 2.0 'mathvariant' attribute
• DEVELOPER  Background thread hang reporting
• DEVELOPER  Support for multi-line flexbox in layout
• FIXED  Various security fixes

Known Issues

• UNRESOLVED  Echo cancellation on apprtc.appspot.com fails (see 974537)
• Unresolved on v28  Resolved in v29
• UNRESOLVED  Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1 has a workaround (see 812695)