Whenever I try to enable YouTube captions using Firefox for Fire TV, it never succeeds. I turn everything on, but the caption window has no OK button, only a button o the bottom right labeled "Go Back", with an icon containing "esc" above it. But the Fire TV remote has NO escape button of course, and the only button I've found that lets me continue the video is the "reverse" button (the button on the bottom left), but that ALWAYS turns off the captions, too! So how the heck can you enable captions and continue watching the same video? I'm stumped.