This is just a little public service announcement warning people of a problem with the mahjong client Tenhou when used in Firefox. The problem is that sometimes no matter what tile you select for discard, the game will automatically discard the one you just picked. In other cases, sometimes if you try to call for a tile, the client won’t listen to you. This is a documented issue on Tenhou’s website, and if you can’t read Japanese you’ll at least notice that some sentence pertaining to Firefox is highlighted in bold.
For those who play mahjong, I’m sure you can imagine the frustration of drawing just the tile you need only for the client to not listen and throw away your chances of winning that round, or worse yet, throwing away a tile you know is clearly dangerous and that you yourself would not have discarded in a million years.
I’ve switched to using Chrome when I play on Tenhou and it works out fine, aside from some strange squeezing of the image that can occur when you go from window to full-screen. At the very least, it’s not the game actively disobeying your orders.