Firefox 39 has been released
for both desktop and mobile systems. The new features include a social
sharing tool for the Firefox
Hello video chat subsystem. It is designed to make it easier to
share Firefox Hello chat invitations over third-party social
networks. In addition, Firefox's existing phishing-and-malware
detection tool has been extended to cover downloads, support has been
added for Unicode 8.0's multi-ethnic emoji characters, and there is
improved support for the Accessible Rich Internet Applications (ARIA) standard.