Sends a volume down keypress to your FireTV if a certain volume level is exceeded.
Needs ADB installed and in path. You can easily wrap it as a service using NSSM.
To use enable ADB on your FireTV and run the program with the desired volume level as the first argument and the address including port as second argument, for example 192.168.178.114:5555
Only ever tested in bluetooth mode. Probably won't work for other modes.