--- a/instantbird/app/application.ini
+++ b/instantbird/app/application.ini
@@ -52,7 +52,7 @@ ID={33cb9019-c295-46dd-be21-8c4936574bee
 
 [Gecko]
 MinVersion=@GRE_MILESTONE@
-MaxVersion=@GRE_MILESTONE@
+MaxVersion=2.0.*
 
 [XRE]
 EnableExtensionManager=1
