Edge's InPrivate mode is supposed to cover your online tracks, but it apparently it records browsing history in InPrivate mode. This makes it a doddle for someone looking at the WebCache file to reconstruct full browsing history, regardless of whether surfing was performed in regular or InPrivate mode.

Forensic Focus, researcher Ashish Singh said most web browsers don't have a provision for storing the details of privately browsed web sessions. But Edge stores websites visited in private mode in the browser’s WebCache file.

The reason is to retrieve crashed private sessions but skilled investigator can use it to get evidence against a person’s wrongdoings.

Microsoft is aware of the problem, and says it is investigating. Redmond is clearly going to fix it but it weird that a key aspect of private browsing could be so fantastically borked.

Speedwise Edge is a pretty good product but the reason we don’t use it is that it launched unable to use extensions. With its private browsing feature also a chocolate teapot, the only feature we can use is the reader friendly screen. But it is not worth it.