Disable suggestions in the Windows 10 Start Menu
https://www.bleepingcomputer.com/news/microsoft/windows-10-start-menu-suggests-firefox-users-switch-to-edge/
Microsoft has started using the Windows 10 Start Menu to suggest that Mozilla Firefox users switch to their new Microsoft Edge browser.
With the release of Microsoft's new Chromium-based Edge browser, Microsoft has started promoting the new browser when typing various keywords in the Windows 10 Start Menu.