title: which versions of chrome/opera/firefox support IndexedDb?
body: <p>As I see in comments of <a href="http://www.html5rocks.com/en/tutorials/indexeddb/todo/#toc-final" rel="nofollow">this page</a> , I could not understand that if <strong>chrome</strong> supports <strong>IndexedDB</strong> really.</p>
  
  <p>I'm going to write an userscript for chrome/opera/firefox, and decided to not use <strong>localstorage</strong>, I just wanna try IndexedDB instead of localstorage, but before start to write script, I have to know that </p>
  
  <p><strong>Which versions of chrome/opera/firefox support IndexedDb?</strong></p>
  
  <p>Thanks.</p>