In the new version synchronization includes several information among the homepage, themes, language chosen, individual configurations of sites visited.
Extensions can be installed also when you run in Incognito mode. You can also choose what extensions to run in incognito mode and what extensions to be disabled automatically when you enter this mode.
Among the improvements there is the drag & drop files and API for Geolocation function. The Geolocation function allows certain sites to find out, with your consent, your location.
Image source: Go4it