Hi Becky
 
I had this problem once. It is caused because the Editor is not initialized until it is made visible:
The last line of the Editor generated code says something like this:

<img src="http://cutesoft.net/iqbox_admin/CuteSoft_Client/CuteEditor/images/1x1.gif?633512184283906250" onload="CuteEditorInitialize('CE_Editor_ID', blah, blah, blah ") />

So when that final image is loaded the Editor initializes ... Firefox does not load the images until the div is made visible. The only way I can see to get around this is a bit of a hack but it should work.

Just copy the onload event from this image and call it on page load:
CuteEditorInitialize('CE_Editor_ID', blah, blah, blah);

Now you should be able to use editor1.getHTML() without problems ... unless, of course, the editor has previously been visible and is hidden again ... I remember coming accross that problem too.

Good luck,

Fred