I would like a Save Target (IE) feature so I can download and re-name a file to another location without needing to open it first.

I receive large numbers of docs that I need to read carefully and evaluate later. Therefore, I need to be able to quickly get them all downloaded and named with my own identifiers and placed in a location like My Documents for later opening and reading, etc. I've enjoyed this feature called "Save Target" for many years with Microsoft's IE browser and am wondering if there is anything similar with Firefox.