title: Replace bookmark URL JavaScript
body: <p>Scenario:
  A reporting tool run in our company has been upgraded to a newer version. It is being accessed by a URL in a browser: www.company.de/programm/v8/client/
  The users were able to save browser bookmarks. I.e.: www.company.de/programm/v8/client/report1</p>
  
  <p>The updated URL has changed (www.company.de/programm/new/v10/client/), thus letting all saved user-bookmarks resolve into nothingness.</p>
  
  <p>My question: Is there a snippet for JS that either updates the URL string from "<em>v8/</em>" to  "<em>new/v10/</em>" or at least scans to existing bookmarks inside the users bookmarks and adds new ones with a new URL (leaving the previous ones untouched)?</p>