I find that if a site is full of java, Firefox doesn't do well. My computer was sluggish at the site, but it is at lots of sites, but nothing untoward happened. I was able to close my browser. I forgot to add that I'm behind a router too, so maybe that's why I didn't have problems? Don't know. But I would hate to see a site maligned needlessly.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi