Jump back on fire tv

I’m using fire sticks on all my tv. How do you jump back to the previous channel using the fire remote?

Double click the play/pause button.

Highly erratic–at least with an IR remote thru a Flirc USB IR receiver. Couldn’t make it work at all with the FTV’s stock remote–no matter how quick I was.

Need user-configurable double-click interval, IMO.

I retired my flirc. Picked up a harmony hub with remote, works much better

The stock FTV remote works fine for me.