diff --git a/platform/firefox/install.rdf b/platform/firefox/install.rdf
index 5f5b7ecb0..e580da8a7 100644
--- a/platform/firefox/install.rdf
+++ b/platform/firefox/install.rdf
@@ -65,7 +65,7 @@
         <targetApplication>
             <r:Description>
                 <id>{{3550f703-e582-4d05-9a08-453d09bdfdc6}}</id>
-                <minVersion>38.3.0</minVersion>
+                <minVersion>31.0</minVersion>
                 <maxVersion>45.0</maxVersion>
             </r:Description>
         </targetApplication>