DIR-2660, DIR-1935?, DIR-882?, ... how to safely install OpenWrt?

Installing and Using OpenWrt
19

Have a look at this thread.....

https://forum.openwrt.org/t/d-link-dir-2660-a2-factory-install/116874

In summary I don't believe you can currently flash the latest stable release but you can use the modified file and also consider the snapshot