Changes

[http://www.google.com/tools/firefox/safebrowsing/ Google Safe Browsing] was an anti-phishing extension released by Google on [http://labs.google.com/ labs.google.com] in December 2005. Google has released this extension to the Mozilla Foundation under MPL 1.1/GPL 2.0/LGPL 2.1 in order that it might be used as part of Firefox if desired. We've landed this change on the trunk as a global extension as of 7 March 2006.You can read the discussion that lead up to to its integration in https://bugzilla.mozilla.org/show_bug.cgi?id=329292

You can read the discussion that lead Google is migrating Safe Browsing to v4 protocol since 2015 and we are now working on integrating to our code base with a incremental approach. That is, we will be landing v4 patches progressively and leave v2 up and running until v4 is extensively tested. In other words, v2 and v4 will co-exist for a while to to its integration in make sure Safe Browsing feature not broken. See https://bugzillawiki.mozilla.org/show_bugSecurity/Safe_Browsing/V4_Implementation to know the plans and milestones for v4 implementation.cgi?id=329292