That was my workaround, too.

But now I have a better workaround which doesn't only work for mdn, but any other high-quality resource: I edited my browser settings to use a different search engine by default. (currently DDG)

It's a bit more work but, alternatively, you could also add a "new" search engine to your browser that uses a custom keyword (e.g. "!mdn") and passes your query to the search interface on the MDN site.