Users have reported about a new firmware that is available for the Lumia 950 and Lumia 950 XL on the Windows Device Recovery tool (WDRT). The update is not available over the air.
The firmware takes the device from version 01078.00038.16025.39xxx to 01078.00038.16082.36xxx.
The new firmware brings usual bug fixes and performance improvements. If you find anything new, do comment below.