Interestingly I went to the site with Internet Explorer and it passed the test (i.e. no page was displayed). BTW, I have been using Firefox for most of my webserfing recently as well.
I have firefox but it really is not any faster for me than IE. Actually its slower to start up and runs the same speed as IE as I'm surfing.
Summary from MozillaZine Forums sticky (IDN Spoofing Issue)... As far as I can tell, These are the 3 known ways to deal with it, take your pick: 1. Edit the compreg.dat file in your profile: put // or # in front of the two lines (in windows) with IDN in them. This will only hold until you install/uninstall a theme/extension and than you have to do it again. 2 Install a nightly and change "network.enableIDN" in about:config (or user.js) to false. 3.Install adblock and put: /[^\x20-\x80]/ in the filter. Adblock>pref.>adblock options>check site blocking>put /[^\x20-\x80]/ in New Filter>Done - and speaking of speed, this type of thing was posted once before, but just for grins, I created this user.js file (a simple text file created in my user profile). All the information was gathered from a sticky (Firefox tuning) in the MozillaZine Forums. To say the least, there was indeed a definite speed boost. I'm still reading - and trust me, there is a lot of material to breeze through- and fine tuning, but there is an advisory or sorts: these options actually exist for internal fine-tuning and debugging purposes and are not meant to be changed by the normal user. They are kind of Voodoo to anyone not intimately familiar with Gecko, because they are not explained anywhere outside of the source. The default values are as optimized as possible for a wide range of different connection types and system speeds. Experimenting with some of the values might improve perceived rendering speed by forcing Gecko to show page contents earlier, but might also have a reverse influence on total page load times. Test thoroughly on your system, as far as it is possible. user_pref("browser.cache.memory.capacity", 65536); user_pref("browser.cache.disk_cache_ssl", true); user_pref("browser.xul.error_pages.enabled", true); user_pref("content.notify.backoffcount", 5); user_pref("content.interrupt.parsing", true); user_pref("content.max.tokenizing.time", 2250000); user_pref("content.maxtextrun", 8191); user_pref("content.notify.backoffcount", 5); user_pref("content.notify.interval", 750000); user_pref("content.notify.ontimer", true); user_pref("content.switch.threshold", 750000); user_pref("network.http.max-connections", 32); user_pref("network.http.max-connections-per-server", 8); user_pref("network.http.max-persistent-connections-per-proxy", 8); user_pref("network.http.max-persistent-connections-per-server", 4); user_pref("network.http.pipelining", true); user_pref("network.http.pipelining.maxrequests", 30); user_pref("network.http.proxy.pipelining", true); user_pref("nglayout.initialpaint.delay", 50); user_pref("plugin.expose_full_path", true); user_pref("network.dnsCacheExpiration", 360); user_pref("network.dnsCacheEntries", 100); user_pref("network.ftp.idleConnectionTimeout", 60); user_pref("network.http.keep-alive.timeout", 30); user_pref("network.http.request.max-start-delay", 5); user_pref("network.http.connect.timeout", 30); user_pref("ui.submenuDelay", 0
