This is apparently an issue that has been happening for months. Users on various social media platforms have reported Edge “stealing” their data from other browsers on their devices. It is true that Microsoft has been working on a feature to import your data from other browsers. However, according to these reports, not only is this feature on without consent, but users are having trouble getting it to stay off.
The entire ordeal got more attention recently when Tom Warren of The Verge reported falling victim to it. After a Windows update, he saw Microsoft Edge open itself with the tabs he had been working on in Chrome. Some research later, and it turns out this isn’t anything new. Microsoft Edge now has its import feature turned on by default. This allows it to import not just your browsing history, but also your bookmarks, cookies, extensions, settings, and even your auto-fill data.