New

• New HTTP cache provides improved performance including crash recovery

• Integration of generational garbage collection

• Public key pinning support enabled

• View historical use information for logins stored in password manager

• Display the number of found items in the find toolbar

• Support for connecting to HTTP proxy over HTTPS

Fixed

• Mac OS X: cmd-L does not open a new window when no window is available

• Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1

Changed

• Removed and turned off trust bit for some 1024-bit root certificates

• Performance improvements to Password Manager and Add-on Manager

Developer

• Developer Information

• HiDPI support in Developer Tools UI

• Inspector button moved to the top left

• Hidden nodes displayed differently in the markup-view

• New Web Audio Editor

• Code completion and inline documentation added to Scratchpad

Web Platform

• drawFocusIfNeeded enabled by default

• ECMAScript 6 built-in method Array#copyWithin implemented

• CSS position:sticky enabled by default

• mix-blend-mode enabled by default

• New Array built-in: Array.from()

• navigator.languages property and languagechange event implemented

• Vibration API updated to latest W3C spec

• CSS box-decoration-break replaces -moz-background-inline-policy

Unresolved

• Repeating background image causes weird text layout issue with HWA off (1011166)