Contacts and conversations sync between the two, while Skype for Web combines the two categories in a single timeline view.

Skype for Web also has pop-up notifications so can do something else while in conversation or waiting for one to start, but will need to be able to install a software plug-in for the website to work with Internet Explorer, Chrome, Safari or Firefox.

Among other browsers, Google’s Hangouts dropped its requirement for a separate Chrome plug-in last year, Mozilla Firefox partnered with Telefonica for 2014’s Firefox Hello, Apple’s Safari supports the facetime:// protocol, while Opera Software had teamed up with JAJAH way back in 2006 to offer web-based telephony direct from Opera Mobile and Opera Mini.

Microsoft, developer of Internet Explorer, purchased Skype in May 2011.