I just started digging deeper into the guts of the Fire TV 5.2.4.1 software update and discovered that it’s the first version of Fire OS to include support for the upcoming Fire TV Edition televisions from Westinghouse, Seiki, and Element. Additionally, I can now definitively confirm that the “AFTRS” build name, which I found traces of earlier this month and guessed was a Fire TV Edition television under testing, is in fact the build name for those TVs.

Since I like keeping track of Fire TV codenames, I dug around for new ones in the 5.2.4.1 update and found that the Fire TV Edition televisions are codenamed “Margo” and/or “Rita.” Most of the code referred to the TVs under the “Margo” codename, but there were a few places that used “Rita.” It’s a little odd to find two codenames, but perhaps one is the codename for the Fire TV Edition project as a whole, which I’m guessing to be “Rita,” and the other is the codename for the specific hardware being released later this year, which I’m guessing is “Margo.”