An academic study found Microsoft s Edge browser to be the least private web browser. Researchers measured connections made by six browsers to back-end services during web browsing sessions. Brave Browser was found to be most private, with Google Chrome, Mozilla Firefox and Apple Safari in a less-secure second group. In the third, least private group was Microsoft Edge and Russian web browser Yandex Browser. Internet Explorer wasn t included in the research since it is largely confined to legacy devices.
Source: https://threatpost.com/microsoft-edge-privacy-busting-telemetry/153733/