--- a/toolkit/content/license.html
+++ b/toolkit/content/license.html
@@ -68,16 +68,17 @@
       <li><a href="about:license#android">Android Open Source License</a></li>
       <li><a href="about:license#angle">ANGLE License</a></li>
       <li><a href="about:license#ansi_term">ansi_term License</a></li>
       <li><a href="about:license#agg">Anti-Grain Geometry Public License</a></li>
       <li><a href="about:license#apache">Apache License 2.0</a></li>
       <li><a href="about:license#apple">Apple License</a></li>
       <li><a href="about:license#apple-mozilla">Apple/Mozilla NPRuntime License</a></li>
       <li><a href="about:license#arm">ARM License</a></li>
+      <li><a href="about:license#atty">atty License</a></li>
       <li><a href="about:license#babel">Babel License</a></li>
       <li><a href="about:license#babylon">Babylon License</a></li>
       <li><a href="about:license#bindgen">bindgen License</a></li>
       <li><a href="about:license#bspatch">bspatch License</a></li>
       <li><a href="about:license#cairo">Cairo Component Licenses</a></li>
       <li><a href="about:license#chromium">Chromium License</a></li>
       <li><a href="about:license#codemirror">CodeMirror License</a></li>
       <li><a href="about:license#cubic-bezier">cubic-bezier License</a></li>
@@ -2684,16 +2685,47 @@ SERVICES; LOSS OF USE, DATA, OR PROFITS;
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 </pre>
 
 
     <hr>
 
+    <h1><a id="atty"></a>atty License</h1>
+
+    <p>This license applies to files in the directory
+    <code>third_party/rust/atty</code>.</p>
+
+<pre>
+Copyright (c) 2015-2016 Doug Tangren
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+</pre>
+
+
+    <hr>
+
     <h1><a id="babel"></a>Babel License</h1>
 
     <p>This license applies to this file in the directory
       <code>devtools/client/debugger/new/debugger.js/</code>.
     </p>
 
 <pre>
 Copyright (c) 2014-2017 Sebastian McKenzie <sebmck@gmail.com>