> Hi, is it  possible to use Prism with HTTrack? I
> would like to have my downloads process separated
> from my usual browsing activity on Firefox.

I don't know what Prism is and I don't use ubuntu

But httrack and firefox are two separate programs. The WebHttrack (not
httrack) uses any browser for the interface. 

Open a separate window in FF, use IE or equivalent with WebHttrack or use the
command line Httrack.