title: Add event listener to only 1 tab in Chrome extension
body: <p>In my Chrome extension, I want to listen for changes to one particular tab only.  Using the <code>chrome.tabs.onUpdated.addListener</code> method, my observation is that this runs on ALL tabs. I have implemented a way to capture the id of the tab that I'm interested in and then check that first, like so:</p>
  
  <pre><code>var extTabId = 10; // captured when this tab is created
  
  chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
      if (tabId !== extTabId) {
          return false;
      }
  
      // do whatever else I need this specific tab in question to do
  }); 
  </code></pre>
  
  <p>Is there an easier way do this so that I only add a listener for <code>extTabId</code>?</p>