In order to be your privacy among us, Chrome Incognito mode can at least offer some extra peace of mind in the sessions. However, some sites may know that you are trying to access them in Incognito, and Google would like a cover on it.
9to5Google reported on Friday that Google is planning to make it harder for sites to see that you are using Incognito mode. One-way developers can see that you are using it by trying to use the "FileSystem" API, which allows you to create permanent files and otherwise be disabled while using Incognito, per. 9to5Google:
Of course it is possible to easily detect if a Chrome user is currently Incognito was not Google's intention. A series of recent commitments to Chromis Gerrit's source code management show that Google is finally seeking to solve this problem after many years of awareness of it.
When prompted for a file system in Incognito, Chrome essentially creates a virtual one using RAM, to fully ensure that it is deleted when you leave Incognito. This should easily close all current methods to discover if Chrome is incognito.
Back in 2017, Ars Technica noted that Boston Globe warned Chrome users that it knew they were trying to access the site using Incognito mode. It gave them a choice: Sign in to your subscriber account and potentially allow Globe access to a portion of your behavior or miss what you are trying to read.
Alexei Miagkov from the Electronic Frontier Foundation told Ars that The time he didn't know about other sites that took the action, but 9to5Google-listed developers are aware of the solution for some time now. And if you choose to sign in to an account in Incognito, Miagkov said, "You make it easy for [sites] to continue tracking you to continue building their (advertising) user profiles."
9to5Google said it obtained an internal document suggesting that Google is planning to remove FileSystem API if it is discovered that it is most commonly used to detect Incognito mode. The site also reported that the solution is expected to come first as an experimental feature in Chrome 74, which will be released in April before potentially becoming a default setting of Chrome 76 or later.