A must-have feature for Nautlius

[Mehdi Fattahi <mah fat gmail com>]

Hi everybody
In Windows, when you select "Open containing folder" from the Firefox  Downloads" window, the directory is opened with the downloaded file auto-selected. This doesn't happen in linux, and causes users a headache to find the downloaded file. I'm not sure but I think it's a nautilus problem and not a Firefox one.