Abusive sites are exploiting the FileSystem API to detect whether a user is browsing in incognito mode in Chrome. Normal browsing supports the FileSystem API and Incognito mode does not support the API. Google has proposed supporting the FileSystem API in incognito mode while maintaining privacy.
Google Chrome is in the early stages of developing a tool that would bring YouTube-like video recommendation feeds to most any website that has the content to support one. The fresh feature has already found its way to Canary builds of Chrome, where it lets people see what videos are queued up next.