However, on Friday, a Yahoo representative from the US admitted that the original statement was 'factually incorrect' because, although Yahoo realises that Firefox-compatibility is important, it is not in a position to promise all future products would be both Internet Explorer and Firefox compatible.
"In the grand scheme of things Firefox is still a new technology. I'm not saying we are not going to be developing and exploring other areas -- we are. But there are so many different products on the Yahoo network that there may be some products that are, perhaps, not appropriate for that browser," the representative said.
The representative confirmed that Yahoo Messenger's Avatar customisation service is definitely being extended to Firefox, but could not provide a firm launch date.