On my new Acer Nitro laptop, after installing Debian 9.4, found that Wifi was not working.
Looking at dmesg output looked like the Qualcom Athreos 10K was not found.
Installed firmware-linux package, but still did not work.
So visited the site as below
Clicked on the commit message on master
Clicked the download link fir linux-firmware-master.tar.gz
Expanded the file and copied the ath10k folder to /lib/firware/
Restarted the system and Wifi started working.