I have been having the same problem recently. The problem lies with an update with the flash player, considering the amount of game updates. For me, "pretty often" can be replaced with extremely often: especially when the game tries to save after spinning the Oracle/winning a match. Well, the last part might be psychological, too, since that's when I'm most upset about it crashing. The crash also seems to crash all elements tabs open at the same time, which is another reason I believe it to be a problem with the flash player.