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      <base href="https://bugs.webkit.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Can not extend Safari offline application cache"
   href="https://bugs.webkit.org/show_bug.cgi?id=165846">165846</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Can not extend Safari offline application cache
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>Safari 10
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>iPhone / iPad
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>iOS 10
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Blocker
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>HTML Events
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>zoltan.darvas&#64;consid.se
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=297084" name="attach_297084" title="screan shot of application cache increase prompt">attachment 297084</a> <a href="attachment.cgi?id=297084&amp;action=edit" title="screan shot of application cache increase prompt">[details]</a></span>
screan shot of application cache increase prompt

When downloading content to the offline application cache Safari will prompt to increase storage up to 50 mb. When you choose to accept Safari will crash, and it is not possible to increase the storage limit to be greater then the out of the box 9mb. 

I tried it out with this page on multiple iOS devices with iOS 10 - 10.1.1.
<a href="http://www.der-schepp.de/appcache-default-size/">http://www.der-schepp.de/appcache-default-size/</a>

Everything worked perfect until iOS update 10</pre>
        </div>
      </p>
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