Cobalt A high-performance, small-footprint platform that implements a subset of HTML5/CSS/JS to run applications, including the YouTube TV app. Start using Cobalt Cobalt on Partner site Efficient Cobalt's small binary is optimized for memory, reducing the likelihood of out-of-memory crashes. Secure Cobalt ensures strong security by requiring use of HTTPS and CSP. Cross-platform Cobalt's targeted, streamlined porting process supports a wide range of platforms and device types....