STR: Using FF22 * Go to the homepage * Open the cats dropdown * Try scrolling What happens * Scrolling is impacted (especially when scrolling back up for me) What should happen * User should be able to scroll without any choppiness Other observations: * FF 24+ performance is much better + additionally the scaling bug preventing us using a smaller sprite and scaling it up is fixed so once stable hits 24 we should update the sprite again.

I kept bug 892717 open for that. But this is more specific which is good.

QA Notes: You'll need to test with FF22 The scroll performance is not perfect but this is an improvement and close to or better than the pre-sprite performance. Please compare with production to see the difference. As noted above performance on ff24 and above should be a lot better still.