What is the Download Manager?


The Download Manager is a feature of Firefox that allows you to
  track and manage your past and current file downloads.  It is a convenient way
  to escape the clutter of multiple downloading windows while still preserving
  access to download statistics.


The Download Manager will appear when you download files, when you select
  Tools > Downloads, and when you press
  CtrlCmd+JCtrlCmd+Y.



What can I do with the Download Manager?


In addition to keeping information on all your downloads in one place, the
  Download Manager keeps convenient download actions easily accessible for each
  of your downloads.



 
Pause

 
    You can pause any downloads currently in progress by clicking the
        Pause link beside the file entry.  This may be useful, for
        example, if you need to open a small download started after a large
        download. Pausing downloads gives you the choice to decide which of your
        downloads are most important.  When you want to continue downloading those
        files, simply use the Resume link to finish those downloads.

 
Cancel

 
    If after starting a download you decide you no longer need that file,
        canceling the download is simple: just use the Cancel link beside
        that file entry to cancel it and free up your connection for your browsing
        and other downloads.

 
Open the File

 
    When a download has finished, the Open link will appear
        by the file entry. Use it to open the file.

 
Remove the File's Entry

 
    If you do not wish to store information on a particular download, removing
        the entry is as simple as the click of a mouse.  Simply use the
        Remove link beside the file entry to delete it.

 
Retry a Download

 
    If for any reason a download does not complete, it is easy to attempt the
        download again.  To recover from a failed download and retry it, just use
        the Retry link next to the file entry and Firefox will
        restart the download for you.