From: Apple Product Security
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APPLE-SA-2016-05-16-5 Safari 9.1.1

Safari 9.1.1 is now available and addresses the following:

Safari
Available for:  OS X Mavericks v10.9.5, OS X Yosemite v10.10.5,
and OS X El Capitan v10.11.5
Impact:  A user may be unable to fully delete browsing history [...]