The latest Insider build 8.78 was fully released and this is what we were working on.
New Call Screen additions: In our efforts to modernize the call stage, we have added the ability to hide call participants at the top as a way to enlarge the call stage. You can also pin call participants that you would like to see on the stage, and then view both the presenter and yourself at the top tray, while in Content view (presentation mode). Improvements have also been made to the avatars of the call participants on the top tray.
Bing background improvements: Improvements to your experience when you set a daily bing background image that refreshes daily, while on a video call
Video background fixes: Even after a call ends and you restart another, you are able to maintain the earlier set video call background
Office Lens integration improvements: when using the Office Lens camera to create, edit and review photos and videos which you can share on Skype, on iOS
UI performance improvements: on Android
Skype for web: enabled on all browsers i.e. Firefox. Audio and chat is enabled on Firefox - video support coming soon.
Bug fixes and stability improvements
Please let us know what you think about the latest changes, either here in the community or through the Skype app. And you can always go to Skype’s User Voice to submit and vote for new features and ideas.
The Skype Team