Firefox hangs when reading data into a form

I built a database-driven website which allows a user to change text and pictures thru a series of text boxes in a form. Firefox can take up to 2 minutes to populate the form from the database while all other Mac browsers take just a second or two. I've reset firefox and reinstalled it and started in Safe Mode, but no changes.
I'd like to keep using Firefox but it doesn't work.

Sorry, I don't want to sound as if I was "blowing you off" ....
Are you familiar with the developer tools that are built into Firefox?
https://developer.mozilla.org/en-US/docs/Tools/Tools_Toolbox
https://developer.mozilla.org/en-US/docs/Tools
Might help you figure out what Firefox "is choking on".
Also, a live example URL of that webpage would be helpful when you post over at the MozillaZine fora.

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