PPSX Firefox and LibreOffice

[lupo1939]

I am running Ubuntu 11.10 and have received a PPSX file, via Firefox, that came from someone running Windows 7. I can't open it. My best guess is that LibreOffice Impress is what I need. The nearest I can get with Firefox preferences is LibreOffice SO, whatever THAT is. Impress is not an available choice. When I do the download, and go to the 'open with' screen, LibreOffice (in any form) is not shown as an option. What am I doing wrong?

[KingYaba]

You're not doing anything wrong. If you haven't figured it out yet, just manually direct it to /usr/bin/libreoffice