diff --git a/platform/firefox/install.rdf b/platform/firefox/install.rdf
index 2607c14..e186b5b 100644
--- a/platform/firefox/install.rdf
+++ b/platform/firefox/install.rdf
@@ -19,7 +19,7 @@
             <r:Description>
                 <id>{{ec8030f7-c20a-464f-9b0e-13a3a9e97384}}</id>
                 <minVersion>24.0</minVersion>
-                <maxVersion>38.0</maxVersion>
+                <maxVersion>39.0</maxVersion>
             </r:Description>
         </targetApplication>
 
@@ -28,8 +28,17 @@
             <r:Description>
                 <id>{{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}}</id>
                 <minVersion>2.21</minVersion>
-                <maxVersion>2.35</maxVersion>
+                <maxVersion>2.36</maxVersion>
             </r:Description>
         </targetApplication>
+
+        <!-- Thunderbird
+        <targetApplication>
+            <r:Description>
+                <id>{{3550f703-e582-4d05-9a08-453d09bdfdc6}}</id>
+                <minVersion>24.0</minVersion>
+                <maxVersion>39.0</maxVersion>
+            </r:Description>
+        </targetApplication> -->
     </r:Description>
 </r:RDF>