i asked you the version as well 
rejetto i dont know

uploader wasnt me

i knew only hfs said - agent mozilla, i viewed http request, hfs said -connection-keep alive, content-multipart, bla bla bla etc, while chrome uploader, hfs said -connection-keep alive, content-261458778 bytes, I mean chrome shows the whole size of a file(2,5 gb) and mozilla shows multy part, but it loads the same part of the file 10 times, then it stops loading, the favourite file was downloaded by torrent. But I would like to use HFS. however this LAG bothers. I don't whose fault is.