title: Disable / Enable Chrome Extension Via Browser Action / Icon
body: <p>The chrome extension I am developing inserts content scripts and css onto every page of a website.  However, the user may have a certain page or pages he or she does not want the extension to run on, so it would be great if I could set up the browser action as basically a toggle on / off.</p>
  
  <p>What I'd like to do is something like this:</p>
  
  <pre><code>chrome.browserAction.onClicked.addListener(function(tab) {
  
      //IF ENABLED THEN DISABLE
  
      //IF DISABLED THEN ENABLE
  
  } 
  </code></pre>
  
  <p>Any help would be greatly appreciated!</p>