2GB file upload limit

This group seems a good place to start.

I am trying to find out the root cause of the 2GB browser file upload
limitation. Many web pages discuss the fact that no browser supports file
uploads larger than 2GB. However, I cannot find any references as to why there
is such a limit.

I am interested in the root cause of this limitation. Mostly to answer customers
asking for larger file uploads.

- Is there a natural limit in the multipart/form-data specification? I could not
find one.
- Have *all* browsers 32 bit counter overflows and no one has built a browser
for larger files?
- Other reasons?