download large file using browser fails before end

I received an official reply to my help desk ticket on November 6 (nearly a week after I originally sent it) but frankly, I'm disappointed with the level of service I received. 

If anything, the first response gave me the impression that the technical support person actually hadn't paid much attention to what I originally wrote since one of the questions he asked me was "which files aren't syncing" even though my help desk ticket clearly stated that this was not a problem which involved their proprietary software application but rather one encountered using drag-and-drop to upload files through the browser.  (I tried using the application at one point but syncing files automatically is not a priority for me and I don't particularly want to keep most of these files resident on my system...that's what I have Dropbox *for*, to serve as a place to store files so that they're not taking up space on my hard drive.)

The follow-up response (which I received three days later in response to the answers I gave to his questions) was also disappointing since it implied that the problem could not possibly be related to Dropbox and must therefore be Firefox's fault.  He suggested that I clear the cache even though I'd already stated quite clearly in response to one of the questions from his first response that I'd subjected my computer to a fairly comprehensive tune-up -- which included emptying the internet cache (as well as updating the operating system and anti-virus software, scanning the computer for viruses, clearing the registry of obsolete entries, defragmenting the hard drive, etc.).  He also suggested disabling the plug-ins even though I had the same plug-ins installed on Firefox when Dropbox was still performing the way it was supposed to several weeks ago.  One of his final suggestions was basically "well, use some browser other than Firefox to upload files or else use our software application".

First of all, if his website is incompatible with a major (and popular) web browser like Firefox, most people would understandably interpret this as a problem which Dropbox ought to be taking steps to address rather than expecting other people to simply work around it.  Secondly, not everyone wants to use their application or would even benefit from doing so since a major feature of the application is that it (supposedly!) keeps files in the cloud automatically synced with files on the computer...but not everyone cares about that.  Some of us just want a place where we can store files that we don't use much or at all right now but might need or want later, files which we don't want taking up space on our hard drive.