https://www.bleepingcomputer.com/news/google/google-chrome-and-edge-are-creating-random-debuglog-log-files/

A bug in the latest release of Chrome, and other Chromium-based browsers, is causing random debug.log files to be created on user's desktops and other folders.

On October 6th, 2020, Google released Chrome 86 to the 'Stable' branch, and all users were auto-updated to this version. Other browsers based on Chromium, such as Brave and Microsoft Edge, also upgraded to this version around the same time.