I use Firefox, too. But it works for me. It's possible that you have popups blocked, or that your anti-virus or firewall are preventing you from downloading the .exe file for bleachcalc. Sometimes that happens. Try enabling popups for this site and see what happens. When I click on the link, a dialog box appears indicating a download of the file will begin if I OK it. (takes a few seconds for it to complete preparations before the OK button is "live" and then it works. Let me know if it does not and maybe I can email the file to you.
drband
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