Error : mousedown is not a function
<p>No matter what web page I'm on, whenever I right click on the page I get this error on the console:</p>

<pre><code>Uncaught TypeError: $(...).rmousedown is not a function
    at HTMLDocument.document.onmouseup (mouseTrack.js:196)
</code></pre>

<p>What is the cause of this? Doesn't seem to cause any issues, but I'm curious where this comes from. I'm running chrome Version 55.0.2883.87 m (64-bit)</p>