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    <body><span class="vcard"><a class="email" href="mailto:rbyers&#64;chromium.org" title="Rick Byers &lt;rbyers&#64;chromium.org&gt;"> <span class="fn">Rick Byers</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION (Safari 9.1): JavaScript alerts from background tabs block foreground tabs"
   href="https://bugs.webkit.org/show_bug.cgi?id=155925">bug 155925</a>
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            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
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           <td style="text-align:right;">CC</td>
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               &nbsp;
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           <td>rbyers&#64;chromium.org
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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION (Safari 9.1): JavaScript alerts from background tabs block foreground tabs"
   href="https://bugs.webkit.org/show_bug.cgi?id=155925#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION (Safari 9.1): JavaScript alerts from background tabs block foreground tabs"
   href="https://bugs.webkit.org/show_bug.cgi?id=155925">bug 155925</a>
              from <span class="vcard"><a class="email" href="mailto:rbyers&#64;chromium.org" title="Rick Byers &lt;rbyers&#64;chromium.org&gt;"> <span class="fn">Rick Byers</span></a>
</span></b>
        <pre>Here's a simpler repro that demonstrates the problem more clearly: <a href="http://output.jsbin.com/mijefe">http://output.jsbin.com/mijefe</a>

This seems likely to hit users in practice.  Eg. I click on links in my gmail that open new tabs, then one of them happens to spawn an alert box while it's in the background - boom of those tabs become unresponsive without any indication of which tab has the dialog box :-(</pre>
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