As you know that problem,
HFS stops when any connections are downloading big-size file(s).(4GB, 6GB, more else....)
Even if it's a problem in Web Browsers, but some other programs(like Berryz Webshare) are solved.
(by using the plugin or anyways....)
So I have a proposal to make an option in Limits menu 'Allows downloading file(s)s in single address under (n)GBs of sizes'
((n) is a number)
It's a limit prevent uploading files over (n)GBs of file(s) in single address.