WTF, Tumblr?

How do I make the super annoying confetti background on my Tumblr dashboard stop? Can I turn this off? I could live with their 10 billionth post announcement on top, but not the moving color spots all over the screen. Otherwise I need to figure out how to stop this moving background (actually not just a simple background, it moves all over their buttons too) from displaying through my Firefox somehow. Why are they doing this to their users?!?

ETA: I figured out that this stops if you don't just reload the dashboard, but leave (like going to your Tumblr) and then come back. Then the announcement and the horrible confetti goes away.