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Firefox 2.0 incorporates the Google Safe Browsing extension in its own Phishing Protection feature to detect and warn users of phishy web sites. This preference, along with browser.safebrowsing.remoteLookups, determines whether or not the Safe Browsing functionality is active.

Possible values and their effects


Compare visited URLs against a blacklist or submit URLs to a third party to determine whether a site is legitimate. (Default)


Disable Safe Browsing.



Mozilla Firefox

A checkbox labeled “Block reported web forgeries” is located under Tools → Options → Security.


In SeaMonkey 2.18 and later, this checkbox is located in the Edit → Preferences → Privacy & Security main tab.

First checked in

2006-05-12 by Brett Wilson

Has an effect in

  • Mozilla Firefox (nightly builds since 2006-05-12; 2.0a3 and above)
  • SeaMonkey (nightly builds since 2013-02-03; 2.18a1 and above)

Related bugs

Related preferences

See also

External links