Comment 91 for bug 18995

When you click on "open with" firefox should list available applications using
freedesktop specification instead of letting the (newbie or power)user looking
for the right folder containing the binary. Under any windows environment when
you click on a file that the environment does not know which application it
need to be launched with, it shows the user a list of all the different
application installed on the computer. WHy does firefow under linux does not
provide this kind of thing? Plus it is trivial to list all available
application by using freedesktop specification.
Personally it is a pan in the ass but as I deal quit well with my linux system
it is ok. But for newbies coming to the opensource/linux world, it is
completely destabilizing.
Thanks

Or yeah use xdg-open!!!
http://portland.freedesktop.org/xdg-utils-1.0/xdg-open.html