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<h1 style="text-align: center;">version - javascript 1.8.6</h1>
<h2>[WHAT]</h2>
<ol>
<li>] the following list outlines features that are new to the js langauage in this version.&nbsp;</li>
</ol>
<h2>[WHY]</h2>
<ol>
<li>] String - object now offers Harmony 'startsWith', 'endsWith', and 'contains' methods (bug 772733).</li>
<li>] The String methods 'link' and 'anchor' now escape the '"' (quotation mark) (bug 352437).</li>
<li>] Experimental support for strawman 'ParallelArray' object has been implemented (bug 778559).</li>
<li>] Support to iterate 'Map/Set' (bug 725909).</li>
<li>] Disabled E4X for web content by default (bug 778851).</li>
<li>] __exposedProps__ - must now be set for Chrome JavaScript objects exposed to content. Attempts to access Chrome objects from content without __exposedProps__ set will fail silently (bug 553102).</li>
</ol>
<h3>&nbsp;</h3>
<h2>[WHERE]</h2>
<ol style="font-size: 10px; font-weight: normal;">
<li>] firefox 17</li>
</ol>
<h2>[WHEN]</h2>
<ol style="font-size: 10px; font-weight: normal;">
<li>]&nbsp;</li>
</ol>
<h2>[EXAMPLE]</h2>
<ol style="font-size: 10px; font-weight: normal;">
<li>] see REF (1) for usage examples of most&nbsp;</li>
</ol>
<h2>[HOW-TO]</h2>
<ol style="font-size: 10px; font-weight: normal;">
<li>]</li>
</ol>
<h2>[REFERENCE]</h2>
<ol>
<li>] MDN&nbsp;https://developer.mozilla.org/en-US/docs/Firefox_17_for_developers#JavaScript</li>
<li>]&nbsp;<a href="https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/17?redirectlocale=en-US&amp;redirectslug=Firefox_17_for_developers#JavaScript">https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/17?redirectlocale=en-US&amp;redirectslug=Firefox_17_for_developers#JavaScript</a></li>
<li>] MSDN&nbsp;<a href="http://msdn.microsoft.com/en-us/library/ie/yek4tbz0(v=vs.94).aspx">http://msdn.microsoft.com/en-us/library/ie/yek4tbz0(v=vs.94).aspx</a></li>
</ol>
<div>
<h3>&nbsp;</h3>
<h3>&nbsp;</h3>
<h3><strong>HTML</strong></h3>
<div>Support for the sandbox attribute on the &lt;iframe&gt; element has been added. (bug 341604)</div>
<h3><strong>CSS</strong></h3>
<div>
<div>Support for @supports at-rule defined in CSS3 Conditional Rules specification has been landed. It is disabled by default. Developers can try it by setting layout.css.supports-rule.enabled to true (bug 649740).</div>
<div>Support for the CSS Selectors Level 4 pseudo-class :dir() allowing selection of elements based on their directionality has landed. (bug 562169)</div>
<div>Support for the newly specified isolate-override value of the CSS unicode-bidi value has landed (bug 774335)</div>
<div>Our prefixed implementation of box-sizing now takes into account min-height and max-height. One step closer to its unprefixing (bug 308801)</div>
<h3><strong>DOM</strong></h3>
<div>
<div>Support for CSSSupportsRule interface defined in CSS3 Conditional Rules specification has been landed (bug 649740)</div>
<div>Support for WheelEvent object and wheel event have been landed (bug 719320).</div>
<div>Support DOM Meta key on Linux again (bug 751749).</div>
<div>On HTMLMediaElement, a new method, mozGetMetadata, that returns a javascript object whose properties represent metadata from the playing media resource as {key: value} pairs (bug 763010).</div>
<div>Support for Range.intersectsNode has been added again; it has been removed in Gecko 1.9 (bug 579638.</div>
<div>Range.compareBoundaryPoints() now throws a DOMException with the NOT_SUPPORTED_ERR value when the comparison method is invalid (bug 714279) .</div>
<h3><strong>WEBGL</strong></h3>
<div>Unchanged</div>
<h3><strong>SVG</strong></h3>
<div>Unchanged</div>
</div>
</div>
<h3><strong>MATHML</strong></h3>
<div>The parsing of the align attribute on &lt;mtable&gt; elements has been updated to treat optional spaces more correctly.</div>
<h3><strong>XUL</strong></h3>
<div>XUL key element supports "os" modifier which is Win key (Super or Hyper key) (bug 751749).</div>
</div>