Apparently that&#x27;s a PNaCl program, that for some reason got a .PNG extension: <a href="https:&#x2F;&#x2F;chromium.googlesource.com&#x2F;chromium&#x2F;src.git&#x2F;+&#x2F;master&#x2F;chrome&#x2F;browser&#x2F;resources&#x2F;whispernet_proxy&#x2F;whispernet_proxy.nmf.png" rel="nofollow">https:&#x2F;&#x2F;chromium.googlesource.com&#x2F;chromium&#x2F;src.git&#x2F;+&#x2F;master&#x2F;...</a><p>and whispernet-proxy doesn&#x27;t show in the list because it is a extension that ships with chrome.<p><a href="https:&#x2F;&#x2F;productforums.google.com&#x2F;forum&#x2F;#!topic&#x2F;chrome&#x2F;3qLYze2nJ3Y" rel="nofollow">https:&#x2F;&#x2F;productforums.google.com&#x2F;forum&#x2F;#!topic&#x2F;chrome&#x2F;3qLYze...</a><p>It seems to have to do something with talking to nearby devices (by audio channels?) via the copresence API:<p><a href="https:&#x2F;&#x2F;developer.chrome.com&#x2F;apps&#x2F;copresence" rel="nofollow">https:&#x2F;&#x2F;developer.chrome.com&#x2F;apps&#x2F;copresence</a><p><a href="https:&#x2F;&#x2F;codereview.chromium.org&#x2F;438513002&#x2F;" rel="nofollow">https:&#x2F;&#x2F;codereview.chromium.org&#x2F;438513002&#x2F;</a><p>That&#x27;s what I could glean from a quick google search...