Quote:Mozilla is adding a native Windows 10 Share experience to Firefox 64. This allows users to share web sites using a variety of applications that are installed in Windows 10.

Similar to how mobile browsers are able to utilize the sharing controls of the mobile operating system, Windows 10 exposes its data transfer controls so that applications can share information with other installed programs.

Starting in Firefox 64, and available now in Firefox Nightly, users can click on the ... menu in the address and then click on the Share button as shown below.

Full reading: https://www.bleepingcomputer.com/news/security/mozilla-adding-native-windows-10-share-support-to-firefox-64/