From MozillaZine Knowledge Base



Firefox incorporates the Google Safe Browsing extension in its own Phishing Protection feature to detect and warn users of phishy web sites.

The list of phishy websites (and of malware-hosting pages) is normally updated periodically from Google. If one of the updates fails, though, Firefox must use an outdated blacklist. To avoid this, Firefox will automatically re-check a site if it looks phishy and the blacklist is possibly out-of-date.

This preference determines the oldest an entry in the local blacklist can be before it is assumed to be out-of-date.

Possible values and their effects

Number of seconds specifying the age at which local blacklist entries are considered out-of-date if a blacklist update fails. Default is 2700 (45 minutes).


First checked in

2008-04-15 by Dave Camp

Has an effect in

  • Firefox (nightly builds since 2008-04-15)

Related bugs

Related preferences

External links