title: localStorage data persistence
body: <p>I recently discovered that it's possible for the user to clear HTML5's <code>localStorage</code> value, which caused me to wonder... exactly how persistant is <code>localStorage</code>? If Flash crashes and wipes all my cookies, would I lose my localStorage data? What if my local cache was cleared to make way for a browser update?</p>
  
  <p>I've seen <a href="https://stackoverflow.com/questions/2326943/when-do-items-in-html5-local-storage-expire">this answer</a>, but it doesn't address browser crashes, updates, cache clearing, etc. Is <code>localStorage</code> really and truly permanent, as the aforementioned answer seems to mantain?</p>