Turns out that the Shield remote's back button DOES work for the Tablo app but I did have to make a modification to the Flirc. Here's what I did to make everything work: On the Harmony Remote (using the MyHarmony software): Attach the Harmony remote. Add the device manufacturer of "Flirc" and the device model number of FireTV (others suggest XBMC or Media Center PC). Rename the device Shield TV. Program your activities. Program the activity buttons and screens to your preference. Sync the remot