Version History of Firefox 30.0 (Beta 9)

• Support for GStreamer 1.0
• Mac OS X command-E sets find term to selected text
• Sidebar button gives easier access to social, bookmark, & history sidebars
• Disallow calling WebIDL constructors as functions on the web
• Fixes to box-shadow and other visual overflow (see bug 480888)
• Mute and volume available per window when using WebAudio
• background-blend-mode enabled by default
• ES6 array and generator comprehensions implemented (read docs for more details)
• Error stack now contains column number
• With the exception of those bundled inside an extension or ones that are whitelisted, plugins will no longer be activated by default (see blog post)
• Support for alpha option in canvas context options (feature description)
• Ignore autocomplete="off" when offering to save passwords via the password manager (see 956906)
• TypedArrays don't support new named properties (see695438)