There's a new firmware update for the X-A3. on 6th March, 2017. See here for download link.
X-A3 Camera Body Firmware Update Ver.2.00 http://www.fujifilm.com/support/digital_cameras/software/firmware/x/xa3/index.html
Detail of the update
The firmware update Ver.2.00 from Ver.1.00 -Ver.1.10 incorporates the following issues:
1. Image quality of Portrait Enhancer is improved by smooth processing. 2. Improvement of AF performance 3. Night (Tripod) function is added in Advanced SR Auto mode. (introduced from firmware ver.1.10)