Recent versions of Microsoft Edge are based on Chromium, the same base that is used for Google Chrome. This means you can install extensions from the Google Chrome store. Here's how to do that.
1. Go the Libkey Nomad page in the Chrome Store
If you have already installed Chrome extensions, you just need to click add to Chrome. If you have not, you'll see a banner notifying you that you can install these. Click on Allow extensions from other stores.
You'll get another notification. Click allow
You can now click add to Chrome and Libkey Nomad will be installed in your browser. Follow the directions on the home page of this guide to configure it for the University of Chicago Library.