The reason why we have decided to buy and use an external product for uploading files is that we do like the responsibility for the tool to work in the current multi-browser world to be at the external party. But I am starting to worry whether this is picked up accordingly for the Ajaxuploader.
There's only 1 reply here suggesting to fix it client-side. Can you give us any confirmation on whether you have identified this issue and are working on making the ajaxuploader to fully support the latest Firefox version for all our users?