Firefox - designMode: disable image resizing handles

Question

How can I prevent the user from being able to resize an image in designMode? (disable the handles when image is clicked)

Answer 1

I cannot comment and vote yet so... according to nmb.ten's answer, you have to use:

document.execCommand("enableObjectResizing", false, false);

But it works only after your content is filled in (I mean if you have to edit some text saved before).