Jun 262011
Annoyed by Firefox’s pop-up saying “Download Complete”? Well, I was. It’s not a small window just in Firefox, but it’s an OS (in my case Linux) window, so it blocks everything underneath. Just for 4 seconds (the standard alert time in Firefox), but annoying nonetheless.
So, type ABOUT:CONFIG in the address-bar, and type alert in the search-box. You will see several keys that you can change, but the one that you want is:
browser.download.manager.showAlertOnComplete
Set it to false (by double-clicking) and you’re done.