Killswitch on FireTvStick

Hello everyone !

I paid for Proton now and I am asking myself if the Killswitch is always on when I use it on my FireTvStick or if I have to activate it ? If I have to, where do I do this ? Because I dont find it anywhere. The only thing I could do and did is to activate it on my phone. I would think that it is only active on my phone right ? Where can I change the settings for all my sticks, tv and much more ?

Thank You for every help !