The address to request the list appears to be:
code:
http://sb.google.com/safebrowsing/downloads?client=navclient-auto-ffox&appver=3.0b2pre&pver=2.0
with this POSTDATA
code:
Removed because it was wrecking the layout and not needed after all
No idea what everything means and i'm not sure about what you get returned, but i'm sure if you desperately want it you could look it up in the firefox code