Update: after restarting the computer my /tmp file has been resized to have the same amount of free space that my filesystem has.
When downloading the file I observed no activity in /tmp looking through nautilus this means that there is no reason for the second firefox dialogue to prevent the file from being saved to a different location with enough space.
I think this has become two bugs.
1) firefox dialog prevents saving the file to a different location
2) /tmp is not resized automatically when new space is available until the machine is restarted
-its also odd i did not receive a warning from ubuntu I was running out of space
*I have reported the second issue as a new bug 285096
Update: after restarting the computer my /tmp file has been resized to have the same amount of free space that my filesystem has.
When downloading the file I observed no activity in /tmp looking through nautilus this means that there is no reason for the second firefox dialogue to prevent the file from being saved to a different location with enough space.
I think this has become two bugs.
1) firefox dialog prevents saving the file to a different location
2) /tmp is not resized automatically when new space is available until the machine is restarted
-its also odd i did not receive a warning from ubuntu I was running out of space
*I have reported the second issue as a new bug 285096