New feature: Shader Pre-Caching. Whenever possible, depending on hardware and driver support, Steam can download pre-compiled shaders for your specific video card. This reduces load times and in-game stuttering during the first few launches of OpenGL- and Vulkan-based games on supported hardware. This feature may use a small amount of additional bandwidth as Steam uploads and analyzes a shader usage report after each run of the game. The feature can be disabled via a new entry in the Settings dialog.
Fixed issues with full-screen mode not scaling video content correctly in the Steam Client
Fixed a UI issue that made it difficult to install new games if a previous installation dialog box was still active
Fixed several rare crashes and hangs reported by customers
Updated web views to Chromium v62.0.3202.62


Windows

Fixed an issue where the Windows Mixed Reality for SteamVR drivers would sometimes not install correctly
Fixed a bug where launching a game could cause the primary monitor to switch as if Big Picture mode were active, even though it is not