Please see this page.
(More - under construction.)
Screenshot  of window with related options (See menu Edit -> Preferences... (Linux) or Tools -> Options (Windows), then Security tab.)
After selecting option "Check by asking [Google] about each site I visit" you can see this window  (red underscoring is from me):
|||In next to last official release in stable line of Firefox 2 (ie. 184.108.40.206) so called "phishing protection" has been disabled by default and the window with related options looks a little bit different than on the screenshot, ie. related options are inactive and the checkbox near "Tell me..." is unchecked.|
|||Note that content of this window is fetched from Google's servers, so the exact text may change in the future.|