HOWTO: Disable the download manager in Mozilla Firefox

shoujo_mallet hates the download manager in Firefox. I have worked out how to disable it:

1. Go to about:config
2. Search for "download"
3. Set browser.download.manager.closeWhenDone to true
4. Set browser.download.manager.showWhenStarting to false

Yes, I know steps 3 and 4 may be a little redundant, but it never hurts to double-check your work.