From zdnet.com
Google has chosen to remove a method websites could use to detect visitors that used Chrome’s Incognito Mode when on a web site.
When Chrome 76 lands at the end of July, sites will no longer be able to check if the FileSystem API is available or not. If it was not available, sites could deduce the visitor was in an incognito tab.
“The behavior of the FileSystem API will be modified to remedy this method of Incognito Mode detection,” Google said in a blog post.