FavLoc is one of those FireFox extensions that should really have been built into the web browser. What it lets you do is create a list of download folders that is easily accessible from the right-click menu in Firefox.
Normally when you want to download a link or file you can either just download it to your default folder or click "Save Link As" and browse to a folder. With FavLoc installed, you can choose from a list of predefined folders, no browsing necessary. For example if you always download programs to one location, music to another, and videos to a third, you can create three favorites and save yourself a lot of time.
[via gHacks]
