How to make Firefox to open only ONE website

Hi,
I was wondering if there is any way to make Firefox to only open '''ONE '''website so that users cannot browse to other websites on the internet. Also to block users so they cannot edit the options etc. I need this as I am doing a project working on healthcare.
Regards,

I do not know exactly what you are doing or what problems you envisage, but possibly it will entail you looking at your server security, and what information that presents on the internet and on your LAN. You should also consider what permissions and software users have, otherwise they could merely use an alternative browser or reconfigure or reinstall firefox.

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Thanks for your response...
But As i said, I have tried with other website on the same browser, there it is opening word document in native program. Also the above mentioned options have been tried earlier.
I have some questions related to this?
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Great :)
Please try to be more specific - generally you do not want to have your GUI driven by embedded code.
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How to make Firefox to open only ONE website

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