Thanks Ken for the reply.
David McRitchie had me try something and it worked.
If you put file:/// in front of c:/sample.htm then Mozilla likes it.

>From: Ken Wagner
>Reply-To: Firefox user help
>Subject: Re: html code
>Date: Tue, 05 Dec 2006 11:21:00 -0600
>richard godson wrote, on 12/5/2006 10:59 AM:
>>I have my own home page and link to a file on the c: drive.
>>The code is:
>>This works fine in IE.
>>Mozilla gives an error message.
>>It there another way to do this so it works with both browsers?

>Short answer: nope. You'll find that IE lets you get away with a lot of
>non-standard things that FF won't.
>A work around would be to use the IE Tab extension
>( and open you page in IE Tab.
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