title: replace '_blank' in javascript window.open links with '_self'
body: <p>I'm trying to make a small chrome extension that will replaces the target in javascript window.open links but not sure how to approach.</p>
  <p>this is an example link:</p>
  <pre><code>&lt;a href=&quot;javascript:void(window.open('https://www.google.com','_blank','toolbar=1,location=1,status=1,menubar=1,scrollbars=1,resizable=1'));&quot;&gt;
  </code></pre>
  <p>Here I want to replace '_blank' with '_self' instead so all these links open in the same tab.</p>
  <p>Edit: just noticed some of the links has __blank or _new so need to replace other variations.</p>