This feature is currently available on Opera for Desktop. The aim of this is to make it easier to stay on top of conversations from various messaging apps, by baking their services right into the app. We hope to see this feature on Opera for Android soon.
The feature works in two ways. First, you can pin the icons to the sidebar and click them when you feel the need to chat. The other option is to pin the chat window so that it sits alongside your current tab. It also gives you the option to drag and drop photo into the messenger icon and the browser will take care of the rest.
Now, you can now chat on Whatsapp, Facebook Messenger and Telegram while browsing on Opera. You can as well switch between these social accounts whenever you like, pin the messaging tab for easier access and use shortcuts to jump from one service to the other.
Opera has now named the new version of its browser Opera Reborn; and you can download it Here for your PC.