Hey! If you are facing any issues in setting Firefox as a default Windows 10 browser. Follow some quick and fresh tweaks to resolve this problem.
● Reinstall the browser
● Set Firefox as a default browser for all default apps.
● Use the control panel interface to change the settings
● Enforce Firefox via the default by Apps menu
Still, the problem persists after applying the steps mentioned above. Feel free to contact the Mozilla Firefox customer service number and talk to expert technicians to resolve the query with the best possible solution.