You can now make calls on Skype for Web without using pluginsMonday, 18 Apr 2016
Skype has announced that it’s now possible to use Skype for Web, Outlook.com, Office Online and OneDrive for real-time, plugin-free voice, video and group video calling on Microsoft’s Edge browser.
The latest version of Firefox has built-in instant messagingWednesday, 23 Sep 2015
Built-in instant messaging in a browser? Firefox has that now.