Content Security Policy: Couldn't parse invalid source chrome-extension

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I am getting an error from my MacOS Firefox-Firebug-Console-js and hoping someone might offer a helpful suggestion. I am seeing the same error on other sites with Facebook Like buttons e.g. http://www.mcdonalds.com/us/en/home.html

Here is my Firebug-Console-js error / warning:
"Content Security Policy: Couldn't parse invalid source chrome-extension://lifbcibllhkdhoafpjfnlhfpfgnpldfl"

Other than the Firebug-Console-js error / warning my FB button seems to be functioning correctly. So far I've tried changing jquery.min.js versions, updating my FB open graph meta properties, taking my FB site out of the development phase and making it public. The only thing that works for me so far is to comment out my FB sdk code:

<div id="fb-root"></div>
<script type="text/javascript">(function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return; js = d.createElement(s); js.id = id;
    js.src = "//connect.facebook.net/en_US/all.js#xfbml=1&appId='myappId'";
    fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>

Thanks ahead of time for any help!