No need to delete the account, just don't log in if you're convinced it's logging into the site that's causing the problem. There are a LOT of firefox users here and I haven't heard of this issue before.
I need to know as well. I just signed up because I had considered a Prius as a daily driver, but I quickly got the cold shoulder with only my first post. This apparently isn't the place for me, unfortunately. If anyone knows how, please post. Thanks!