Mega.co.nz Download Location

Someone send me a large file using Mega. I opened the link in Safari and got a warning, that Safari is not fully supported. I took notice of this, but decided to try it anyway real quick before going through the hassle of installing another browser. The download started, but did not appear in the usual Safari downloads area. Instead it showed the progress within the website. Also I could not find it in the Downloads folder in the finder. So I got freaked out and aborted the download.

Now I am wondering where the part of the file that I did download went on my hard drive and how to remove it.

So apparently, it has saved the partial download somewhere deep in my system, as I suspected. Does anyone know where this location would be for a Safari download, so that I can delete it?

I looked at all files modified yesterday, including system files, and could not find anything. I know this is silly, but I am just to neurotic to let it go....