Microsoft Edge no longer uses search providers you have to install
from Microsoft’s website. Instead, when you visit a web page that uses
the “OpenSearch” standard to expose its search engine information, Edge
notices this and makes a record of the search engine information.
This is
the same way Google Chrome works, too—visit a web page with OpenSearch and Chrome will automatically detect it.
All you need to do is visit the search engine’s website to add that search engine to Edge. If you want to install Google, visit
Google’s homepage. Once you’ve done so, you can make it the default using the instructions below.
Not every search engine supports OpenSearch yet, but we expect search engines will add support for this very quickly.
To change your search provider, click the menu button—that’s the
button with three dots at the top-right corner of the Microsoft Edge
window. Select “Settings” in the menu.
Scroll down in the “Settings” panel and click the “View advanced settings” button near the bottom.
Scroll down in the “Advanced settings” panel and you’ll see the
“Search in the address bar with” setting. Click the “Change search
engine” button.
You’ll see a list of available search providers. Select the search engine you want to use and click or tap “Set as Default”.
If the search engine you want to use doesn’t appear here, be sure
you’ve visited the search engine’s homepage first. If you have visited
the homepage and it still doesn’t appear, that search engine doesn’t
support OpenSearch yet. You may want to contact the search engine and
ask it to support OpenSearch so you can use it as your default search
engine in Microsoft Edge.
https://www.howtogeek.com/221709/how-to-change-your-default-search-engine-in-microsoft-edge/