Have you filed bugs on Mozilla for those? There's more than a JS engine to a web app; you could be running into layout or style system issues just as easily...

Have you filed bugs on Mozilla for those? There's more than a JS engine to a web app; you could be running into layout or style system issues just as easily... But the important part is that we can't fix performance issues we don't know about, so please report performance issues if you encounter them!