There is one way the timing is odd, though. In order to treat incognito browsers differently, a website needs to be able to determine that they’re incognito browsers. Earlier this month, it came out that Google Chrome, the web’s most popular browser, was working to prevent sites from doing just that. Code that blinds servers to private browsing has already been added to the current Canary version of Chrome (a version used for early developer testing). New features in Canary, if all goes well, typically roll out to the standard Google Chrome in three or four months — so this sort of tactic will likely break by summer in the browser that currently has 63 percent market share.