Version-Release number of selected component (if applicable):
firefox-3.0-1.fc9.i386

Steps to Reproduce:
1. Start a few large downloads (e.g. an ISO image, long video)
2. In the middle of the download, shut down your wifi router - or do something
   similar to simulate a temporary loss of internet connection (e.g. when the
   signal is weak).
3. Observe that Fx has gone into offline mode, and:
   a. terminated all downloads
   b. shows a separate dialog box for each terminated download
4. Go online again, restart the downloads, and observe that the previously
   downloaded data is being downloaded again.
  
Expected results:
At minimum, 4. should be able to resume downloads.  [Perhaps this depends on
server capabilities?]

Expected is that Fx doesn't terminate downloads, and lets them time out - or
continue if the network connection comes back up.

Terminating the downloads might perhaps be the right thing if the user went
offline intentionally - but definitely not when the offline state is transient.

Additional info: