• Updated the web browser component to Chromium version 47.0.2526.49
  
• Improved error messages for some unusual login failure cases
  
• Fixed a crash when launching games for the first time while Steam is offline
  

• Improved UI navigation when using the mouse in several areas
  
• Changed the default ambient music volume to off, this setting can be configured under the Audio Settings page
  
• Expanded the Resume and Explore part of Library, adding more rows based on friend activity and recent game updates
  
• Added a new option to control how the left Steam Controller touchpad scrolls Web pages (see "Web Browser" settings)
  
• Added a new option to the system menu, "Minimize Big Picture"
  
• Improved zooming in web browser
  
• Fixed going back to the main menu when selecting some pages inside of settings
  
• Fixed Steam Community landing page not loading in Italian
  
• Fixed being unable to navigate to the right column of Friends settings
  
• Fixed some Steam/XInput controller buttons showing up as "UNKNOWN" when binding shortcuts (ie., taking a screenshot)
  
• Fixed Exit menu popping up when just tapping the Guide button on a controller, not only on a long hold
  
• Fixed watching DOTA 2 broadcasts
  
• Fixed several crashes
  

• Fixed failing to send some special characters to games through the Big Picture overlay keyboard
  
• Fixed The Beginner's Guide crashing on startup
  
• Improved multi-monitor support for the Steam Link
  

• Fixed Steam Controller failing to work after exiting and relaunching Big Picture mode without restarting Steam
  
• Fixed web pages displaying at 1/4 of their correct size under Big Picture
  

• Fixed an unexpected 60fps framerate cap when broadcasting is enabled
  

• Switched the Steam UI to use the VR dashboard on Windows for Oculus devices.
  

• Added game controller mouse emulation for game launchers, use right trigger to click
  
• Added new advanced host and advanced client options. Some settings, such as hardware encoder choice, are only accessible from Big Picture mode
  
• Updated game capture modes for improved consistency and reliability
  
• Reduced frame-rate impact of running Big Picture mode while streaming
  
• Improved interactions with third-party overlays such as Uplay
  
• Improved video stream quality when AMD hardware encoding is enabled
  
• Fixed some known causes of black screen flashes
  
• Fixed issues when switching games or when transitioning from launcher to game
  
• Fixed many framerate issues with capture on NVIDIA SLI systems
  

The list of changes here are too numerous to call out, so we have made an overview of the changes.