Firefox 13.0.1 introduces the following new features, security updates and fixes

• FIXED – Windows Messenger did not load in Hotmail, and the Hotmail inbox did not auto-update (764546, fixed in 13.0.1)
• FIXED – Hebrew text sometimes rendered incorrectly (756850, fixed in 13.0.1)
• FIXED – Flash 11.3 sometimes caused a crash on quit (747683, fixed in 13.0.1)
• NEW – When opening a new tab, users are now presented with their most visited pages
• NEW – The default home page now has quicker access to bookmarks, history, settings, and more
• CHANGED – SPDY protocol now enabled by default for faster browsing on supported sites
• CHANGED – Restored background tabs are not loaded by default for faster startup
• CHANGED – Smooth scrolling is now enabled by default
• DEVELOPER – 72 total improvements to Page Inspector, HTML panel, Style Inspector, Scratchpad and Style Editor
• DEVELOPER  – The column-fill CSS property has been implemented
• DEVELOPER – Experimental support for ECMAScript 6 Map and Set objects has been implemented
• DEVELOPER – Support for the CSS3 background-position property extended syntax has been added
• DEVELOPER – The :invalidpseudo-class can now be applied to the element
• DEVELOPER – The CSS turn <angle> unit is now supported
• SECURITY FIX – MFSA 2012-40    Buffer overflow and use-after-free issues found using Address Sanitizer
• SECURITY FIX – MFSA 2012-39    NSS parsing errors with zero length items
• SECURITY FIX – MFSA 2012-38    Use-after-free while replacing/inserting a node in a document
• SECURITY FIX – MFSA 2012-37    Information disclosure though Windows file shares and shortcut files
• SECURITY FIX – MFSA 2012-36    Content Security Policy inline-script bypass
• SECURITY FIX – MFSA 2012-35 Privilege escalation through Mozilla Updater and Windows Updater Service
• SECURITY FIX – MFSA 2012-34    Miscellaneous memory safety hazards