[Mandelbug]

I tried in both FF and Chrome, no issues with performance noticed. Do you have a lot of plugins with FF?

I actually had an opposite problem, the game was incredibly generous with its imprecise collision. I could rotate twice and catch two rectangles falling at the same time on the same paddle and finish a group. I was overwhelmed by the number of sides I had to simultaneously defend and the number of different falling pieces. The animations, I don't think, made much difference in difficulty or ease. Mostly I wound up surprised that I had cleared a group, rather than the opposite problem you described.

Funny we both had very opposite experiences.