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Revision 999249 of Firefox JavaScript changelog

  • Revision slug: Web/JavaScript/New_in_JavaScript/Firefox_JavaScript_changelog
  • Revision title: Firefox JavaScript changelog
  • Revision id: 999249
  • Created:
  • Creator: fscholz
  • Is current revision? No
  • Comment Add 45 and 46
Tags: 

Revision Content
{{jsSidebar("New_in_JS")}}

The following is a changelog for JavaScript features in Firefox releases.

Firefox 46

{{page('en-US/docs/Mozilla/Firefox/Releases/46','JavaScript')}}

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Firefox 45

{{page('en-US/docs/Mozilla/Firefox/Releases/45','JavaScript')}}

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Firefox 44

{{page('en-US/docs/Mozilla/Firefox/Releases/44','JavaScript')}}

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Firefox 43

{{page('en-US/docs/Mozilla/Firefox/Releases/43','JavaScript')}}

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Firefox 42

{{page('en-US/docs/Mozilla/Firefox/Releases/42','JavaScript')}}

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Firefox 41

{{page('en-US/docs/Mozilla/Firefox/Releases/41','JavaScript')}}

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Firefox 40

{{page('en-US/docs/Mozilla/Firefox/Releases/40','JavaScript')}}

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Firefox 39

{{page('en-US/docs/Mozilla/Firefox/Releases/39','JavaScript')}}

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Firefox 38

{{page('en-US/docs/Mozilla/Firefox/Releases/38','JavaScript')}}

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Firefox 37

{{page('en-US/docs/Mozilla/Firefox/Releases/37','JavaScript')}}

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Firefox 36

{{page('en-US/docs/Mozilla/Firefox/Releases/36','JavaScript')}}

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Firefox 35

{{page('en-US/docs/Mozilla/Firefox/Releases/35','JavaScript')}}

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Firefox 34

{{page('en-US/docs/Mozilla/Firefox/Releases/34','JavaScript')}}

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Firefox 33

{{page('en-US/docs/Mozilla/Firefox/Releases/33','JavaScript')}}

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Firefox 32

{{page('en-US/docs/Mozilla/Firefox/Releases/32','JavaScript')}}

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Firefox 31

{{page('en-US/docs/Mozilla/Firefox/Releases/31','JavaScript')}}

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Firefox 30

{{page('en-US/docs/Mozilla/Firefox/Releases/30','JavaScript')}}

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Firefox 29

{{page('en-US/docs/Mozilla/Firefox/Releases/29','JavaScript')}}

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Firefox 28

{{page('en-US/docs/Mozilla/Firefox/Releases/28','JavaScript')}}

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Firefox 27

{{page('en-US/docs/Mozilla/Firefox/Releases/27','JavaScript')}}

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Firefox 26

{{page('en-US/docs/Mozilla/Firefox/Releases/26','JavaScript')}}

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Firefox 25

{{page('en-US/docs/Mozilla/Firefox/Releases/25','JavaScript')}}

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Firefox 24

{{page('en-US/docs/Mozilla/Firefox/Releases/24','JavaScript')}}

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Firefox 23

{{page('en-US/docs/Mozilla/Firefox/Releases/23','JavaScript')}}

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Firefox 22

{{page('en-US/docs/Mozilla/Firefox/Releases/22','JavaScript')}}

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Firefox 21

{{page('en-US/docs/Mozilla/Firefox/Releases/21','JavaScript')}}

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Firefox 20

{{page('en-US/docs/Mozilla/Firefox/Releases/20','JavaScript')}}

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Firefox 19

{{page('en-US/docs/Mozilla/Firefox/Releases/19','JavaScript')}}

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Firefox 18

{{page('en-US/docs/Mozilla/Firefox/Releases/18','JavaScript')}}

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Firefox 17

{{page('en-US/docs/Mozilla/Firefox/Releases/17','JavaScript')}}

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Firefox 16

{{page('en-US/docs/Mozilla/Firefox/Releases/16','JavaScript')}}

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Firefox 15

{{page('en-US/docs/Mozilla/Firefox/Releases/15','JavaScript')}}

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Firefox 14

{{page('en-US/docs/Mozilla/Firefox/Releases/14','JavaScript')}}

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Firefox 13

{{page('en-US/docs/Mozilla/Firefox/Releases/13','JavaScript')}}

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Firefox 12

{{page('en-US/docs/Mozilla/Firefox/Releases/12','JavaScript')}}

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Firefox 11

{{page('en-US/docs/Mozilla/Firefox/Releases/11','JavaScript')}}

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Firefox 10

{{page('en-US/docs/Mozilla/Firefox/Releases/10','JavaScript')}}

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Firefox 9

{{page('en-US/docs/Mozilla/Firefox/Releases/9','JavaScript')}}

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Firefox 8

{{page('en-US/docs/Mozilla/Firefox/Releases/8','JavaScript')}}

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Firefox 7

{{page('en-US/docs/Mozilla/Firefox/Releases/7','JavaScript')}}

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Firefox 6

{{page('en-US/docs/Mozilla/Firefox/Releases/6','JavaScript')}}

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Firefox 5

{{page('en-US/docs/Mozilla/Firefox/Releases/5','JavaScript')}}

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Older versions

For versions prior to Firefox 5, see the old JavaScript versions.

 

Revision Source

 
<div>{{jsSidebar("New_in_JS")}}</div>

<p>The following is a changelog for JavaScript features in Firefox releases.</p>

<h2 id="Firefox_46">Firefox 46</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/46','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla46">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/46">Complete release notes for Firefox 46</a>.</li>
</ul>

<h2 id="Firefox_45">Firefox 45</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/45','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla45">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/45">Complete release notes for Firefox 45</a>.</li>
</ul>

<h2 id="Firefox_44">Firefox 44</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/44','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla44">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/44">Complete release notes for Firefox 44</a>.</li>
</ul>

<h2 id="Firefox_43">Firefox 43</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/43','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla43">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/43">Complete release notes for Firefox 43</a>.</li>
</ul>

<h2 id="Firefox_42">Firefox 42</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/42','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla42">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/42">Complete release notes for Firefox 42</a>.</li>
</ul>

<h2 id="Firefox_41">Firefox 41</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/41','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla41">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/41">Complete release notes for Firefox 41</a>.</li>
</ul>

<h2 id="Firefox_40">Firefox 40</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/40','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla40">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/40">Complete release notes for Firefox 40</a>.</li>
</ul>

<h2 id="Firefox_39">Firefox 39</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/39','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla39">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/39">Complete release notes for Firefox 39</a>.</li>
</ul>

<h2 id="Firefox_38">Firefox 38</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/38','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla38">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/38">Complete release notes for Firefox 38</a>.</li>
</ul>

<h2 id="Firefox_37">Firefox 37</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/37','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla37">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/37">Complete release notes for Firefox 37</a>.</li>
</ul>

<h2 id="Firefox_36">Firefox 36</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/36','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla36">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/36">Complete release notes for Firefox 36</a>.</li>
</ul>

<h2 id="Firefox_35">Firefox 35</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/35','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla35">All JavaScript engine bug fixes</a>.</li>
 <li><a href="/en-US/Firefox/Releases/35">Complete release notes for Firefox 35</a>.</li>
</ul>

<h2 id="Firefox_34">Firefox 34</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/34','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla34">All JavaScript engine bug fixes (244)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/34">Complete release notes for Firefox 34</a>.</li>
</ul>

<h2 id="Firefox_33">Firefox 33</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/33','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla33">All JavaScript engine bug fixes (298)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/33">Complete release notes for Firefox 33</a>.</li>
</ul>

<h2 id="Firefox_32">Firefox 32</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/32','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla32">All JavaScript engine bug fixes (294)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/32">Complete release notes for Firefox 32</a>.</li>
</ul>

<h2 id="Firefox_31">Firefox 31</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/31','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla31">All JavaScript engine bug fixes (231)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/31">Complete release notes for Firefox 31</a>.</li>
</ul>

<h2 id="Firefox_30">Firefox 30</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/30','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla30">All JavaScript engine bug fixes (248)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/30">Complete release notes for Firefox 30</a>.</li>
</ul>

<h2 id="Firefox_29">Firefox 29</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/29','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla29">All JavaScript engine bug fixes (331)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/29">Complete release notes for Firefox 29</a>.</li>
</ul>

<h2 id="Firefox_28">Firefox 28</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/28','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla28">All JavaScript engine bug fixes (343)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/28">Complete release notes for Firefox 28</a>.</li>
</ul>

<h2 id="Firefox_27">Firefox 27</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/27','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla27">All JavaScript engine bug fixes (350)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/27">Complete release notes for Firefox 27</a>.</li>
</ul>

<h2 id="Firefox_26">Firefox 26</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/26','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla26">All JavaScript engine bug fixes (318)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/26">Complete release notes for Firefox 26</a>.</li>
</ul>

<h2 id="Firefox_25">Firefox 25</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/25','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla25">All JavaScript engine bug fixes (376)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/25">Complete release notes for Firefox 25</a>.</li>
</ul>

<h2 id="Firefox_24">Firefox 24</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/24','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla24">All JavaScript engine bug fixes (321)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/24">Complete release notes for Firefox 24</a>.</li>
</ul>

<h2 id="Firefox_23">Firefox 23</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/23','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla23">All JavaScript engine bug fixes (290)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/23">Complete release notes for Firefox 23</a>.</li>
</ul>

<h2 id="Firefox_22">Firefox 22</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/22','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla22">All JavaScript engine bug fixes (255)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/22">Complete release notes for Firefox 22</a>.</li>
</ul>

<h2 id="Firefox_21">Firefox 21</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/21','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla21">All JavaScript engine bug fixes (289)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/21">Complete release notes for Firefox 21</a>.</li>
</ul>

<h2 id="Firefox_20">Firefox 20</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/20','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla20">All JavaScript engine bug fixes (242)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/20">Complete release notes for Firefox 20</a>.</li>
</ul>

<h2 id="Firefox_19">Firefox 19</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/19','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla19">All JavaScript engine bug fixes (165)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/19">Complete release notes for Firefox 19</a>.</li>
</ul>

<h2 id="Firefox_18">Firefox 18</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/18','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla18">All JavaScript engine bug fixes (221)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/18">Complete release notes for Firefox 18</a>.</li>
</ul>

<h2 id="Firefox_17">Firefox 17</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/17','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla17">All JavaScript engine bug fixes (231)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/17">Complete release notes for Firefox 17</a>.</li>
</ul>

<h2 id="Firefox_16">Firefox 16</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/16','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla16">All JavaScript engine bug fixes (186)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/16">Complete release notes for Firefox 16</a>.</li>
</ul>

<h2 id="Firefox_15">Firefox 15</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/15','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla15">All JavaScript engine bug fixes (203)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/15">Complete release notes for Firefox 15</a>.</li>
</ul>

<h2 id="Firefox_14">Firefox 14</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/14','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla14">All JavaScript engine bug fixes (135)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/14">Complete release notes for Firefox 14</a>.</li>
</ul>

<h2 id="Firefox_13">Firefox 13</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/13','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla13">All JavaScript engine bug fixes (175)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/13">Complete release notes for Firefox 13</a>.</li>
</ul>

<h2 id="Firefox_12">Firefox 12</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/12','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla12">All JavaScript engine bug fixes (177)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/12">Complete release notes for Firefox 12</a>.</li>
</ul>

<h2 id="Firefox_11">Firefox 11</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/11','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla11">All JavaScript engine bug fixes (167)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/11">Complete release notes for Firefox 11</a>.</li>
</ul>

<h2 id="Firefox_10">Firefox 10</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/10','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla10">All JavaScript engine bug fixes (165)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/10">Complete release notes for Firefox 10</a>.</li>
</ul>

<h2 id="Firefox_9">Firefox 9</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/9','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla9">All JavaScript engine bug fixes (132)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/9">Complete release notes for Firefox 9</a>.</li>
</ul>

<h2 id="Firefox_8">Firefox 8</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/8','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla8">All JavaScript engine bug fixes (154)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/8">Complete release notes for Firefox 8</a>.</li>
</ul>

<h2 id="Firefox_7">Firefox 7</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/7','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla7">All JavaScript engine bug fixes (40)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/7">Complete release notes for Firefox 7</a>.</li>
</ul>

<h2 id="Firefox_6">Firefox 6</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/6','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla6">All JavaScript engine bug fixes (45)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/6">Complete release notes for Firefox 6</a>.</li>
</ul>

<h2 id="Firefox_5">Firefox 5</h2>

<div>{{page('en-US/docs/Mozilla/Firefox/Releases/5','JavaScript')}}</div>

<p>See also:</p>

<ul>
 <li><a href="https://bugzilla.mozilla.org/buglist.cgi?list_id=11242211&amp;resolution=FIXED&amp;classification=Components&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=JavaScript%20Engine&amp;component=JavaScript%20Engine%3A%20JIT&amp;component=JavaScript%3A%20GC&amp;component=JavaScript%3A%20Internationalization%20API&amp;component=JavaScript%3A%20Standard%20Library&amp;product=Core&amp;target_milestone=mozilla5">All JavaScript engine bug fixes (23)</a>.</li>
 <li><a href="/en-US/Firefox/Releases/5">Complete release notes for Firefox 5</a>.</li>
</ul>

<h2 id="Older_versions">Older versions</h2>

<div>
<p>For versions prior to Firefox 5, see the <a href="/en-US/docs/Web/JavaScript/New_in_JavaScript#JavaScript_versions">old JavaScript versions</a>.</p>
</div>

<p>&nbsp;</p>
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