Oh this is nothing new...I have been getting this for so long even BEFORE they introduced the new uploader. Filed a support request, did everything they suggested, did alot of things I thought of on my own, and I'm STILL seeing this. It's really a pita
And I can only click 'allow' for so long before it completely blocks me from use and makes me download Java (AGAIN)...no kidding, without exaggeration I have downloaded Java at least 12 times in the last few months. ALL old versions are gone, I made sure to uninstall anything still lingering on my computer, even cookies.
It seems to me it should be an easy fix on their part (between them and Oracle/Java) but you'd think they would have done it already.
OK rant over, but you are not the only one
EDIT--here's a link to the OLD uploader, but I have the same problem there too