How do I do “save target as” in google chrome? Or firefox?

Question

One of the right mouse click options in windows explorer is "save target as" how do I do the same thing in google chrome or firefox?

Or at least how do I stop certain file-types (e.g., mp3, pdf) from automatically downloading

Answer 1

In Chrome it's called "Save link as..." on OS X and what it does is ask you where to download the file.

There's another option to ask you before the download of each file, just tick the box at the bottom:

Answer 2

Alt + Left click does the same as save target as