Microsoft on Thursday began blocking rival browsers and search providers from using Windows 10's Cortana search box, the operating system's prime search real estate.
While Gavin didn't name names, Mozilla's Firefox modified Windows 10 so that when that browser was made the operating system's default, Firefox's selected search provider generated results from in-Cortana queries, with the ensuing pages appearing in Firefox, not Edge. Other browsers, such as Google's Chrome, did not go that far, but third-party extensions available in the Chrome Web Store did.