This is not a known issue. We do most of our debugging with FF, so it is surprising that that browser in particular would exhibit issues.
You would need to debug it. For some reason the triggers aren't firing or the form isn't submitting properly in firefox. I'd post a URL or even the sample code if you want someone to realistically be able to debug this for you. You may want to post a support incident where you can share your files in a private forum as well.