From MozillaZine Knowledge Base
Firefox 2.0 incorporates the Google Safe Browsing extension in its own Safe Browsing feature to detect and warn users of phishy web sites. This preference determined the URL from which blacklist information was retrieved if browser.safebrowsing.remoteLookups is false and this Safe Browsing service is selected in browser.safebrowsing.dataProvider.
This was an enumerated preference: all preferences whose names started with urlclassifier.provider. were read to generate the list of Safe Browsing providers. The * in the preference name is a non-negative integer, and matches the number in the other preferences needed to describe a provider. (the browser.safebrowsing.provider.* preferences are also used this way.) It also determines the order in which the providers appear in the options dialog.
Renamed to browser.safebrowsing.provider.*.updateURL.
Possible values and their effects
The URL from which blacklist information is retrieved.
First checked in
Has an effect in