Kmessinger gave some good advice. Here are some suggestions Firefox has on the issue you are having. I’m guessing it has something to do with a plugin!
There are a lot of real estate plugins to choose from, it’s all about finding one that works for you. May I suggest ihomefinder, they offer a free 30-day trial. My friend uses it and hasn’t come across any problems.
I don’t know if you’re still looking for an IDX plugin, but I know someone who uses iHomeFinder and loves it. They offer a free 30-day trial!
