There are 4 counts of this issue on 4 pages.
Here's a sample from the import of docs/Web/API/XSLTProcessor:
Error: Unknown Browser "Microsoft Edge".
The API does not have a browser with the name "Microsoft Edge". This could be a typo on the MDN page, or the browser needs to be added to the API.
More information about issue "unknown_browser"
125 <th>Firefox (Gecko)</th> 126 <th>Internet Explorer</th> 127 <th>Microsoft Edge</th> *** ^^^^^^^^^^^^^^^^^^^^^^^ 128 <th>Opera</th> 129 <th>Safari</th>
Here's the full list of imports where this issue was found: