Apparently there seems to be a problem on Firefox when you want to specify a size for a

file-upload box (which is an HTML input control of type "file"). If you just specify the width as
style tag it will (surprisingly ;) ) work with IE but for some reason not with Firefox.
The solution to this
problem is to specify a "size" attribute like:
<input type="file" id="someId" name="someName" size="10"/>
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