If you have multiple browsers but prefer to have a primary one when opening links, here are the following steps on selecting a default web browser within Windows 10.
Step 1. Open Settings from the Start Menu
Step 2. Select Apps
Step 3. Click on Default apps.
Step 4. Under the "Choose default apps" section, click the current default browser.
Step 5. Select the browser you want to make the new default. Windows will detect what web browsers are available.