Scroll down and click the entry under Web browser.
To do so, click the “Use Firefox as my default browser” button. Microsoft has changed how to set default applications in Windows 10 and to help with the process, we have illustrated below all the steps you need to set or change your default back to your intended choice. When you upgrade to Windows 10 or get a device that already has it installed, you may be surprised to find that your default browser is set to Microsoft Edge by Windows. We’re excited to bring all that you love about Firefox, the web browser, to Windows 10.
