KH4 Companion is a small extension I built: it counts down to Kingdom Hearts IV, puts the days remaining on the toolbar badge, pulls series news and trailers from public feeds, carries a lore compendium, and hides a three-lane rhythm minigame in the popup. It has been on the Chrome Web Store since 19 August. As of this week it is also on addons.mozilla.org , which makes it my first Mozilla listing. I had been putting the port off, because "port" sounds like work. It was not. Same build, same...