title: chrome extension update and rewrite to another same extensions
body: <p>hello i have chrome extension which adds background.html as new tab.
  its like speed deal , when you are opening new tab it automatly opens.</p>
  
  <p>i have 26k users but every day only half visits my extension. (opens new tab with my background html) because after my extension maybe users installed another junk extensions which adds website as new tab.</p>
  
  <p>so i want to return back my users by update.</p>
  
  <pre><code>&lt;html&gt;
      &lt;head&gt;&lt;/head&gt;
      &lt;body style="margin:0px;padding:0px;"&gt;
          &lt;iframe 
              style="width:100%;height:100%;margin:0px;padding:0px;border:none;" 
              src="/background.html"
              name="ext-newtab-iframe"&gt;&lt;/iframe&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>my extensions code looks like that  how can i change if i want to return back my users. i want to rewrite it to another extensions</p>