an option to disable "download started" would be great

Very interesting. It just miss a progressive download bar or something like that. Nice extension. Thanks sealj553.

Works great and visuals are good. Even pops up when Firefox is minimized and you are doing something else.

A few options would make it perfect, such as changing position, size, and duration for both notifications. I would make the "Download Started" banner last 3-5 sec, and "Download Complete" banner last until closed manually, in case I go AFK and forget when I come back. Still deserves 5 stars though.