Description of Problem:
When I download a file, Mozilla SYSTEMATICALLY creates an intermediary copy
under /tmp. My /tmp partition is of limited size, therefore I am limited in the
size of the files I download even if the destination directory is MUCH larger
than /tmp


Version-Release number of selected component (if applicable):
1.0.1-9

How Reproducible:


Steps to Reproduce:
1. Have a machine with a /tmp partition of a limited size (Let's say 128Mb) and
a /home partition of about 1Gb
2. go to, for instance, http://www.enlightenment.org/pages/source.html and try
to download http://cvs.sourceforge.net/cvstarballs/enlightenment-cvsroot.tar.gz
(235Mb) under your home directory (/home/my_directory, as I said about 1Gb large) 
3. Wait until the download crashes because /tmp is full... (even if /tmp is NOT
supposed to be involved in the download...)


Actual Results:
Download stopped.


Expected Results:
File downloaded under /home/my_directory without any "left-over" under /tmp