diff --git a/extensions/firefox/install.rdf b/extensions/firefox/install.rdf
index a7e98dec3..832dc7abb 100644
--- a/extensions/firefox/install.rdf
+++ b/extensions/firefox/install.rdf
@@ -23,7 +23,7 @@
       <Description>
        <em:id>{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}</em:id>
        <em:minVersion>2.40</em:minVersion>
-       <em:maxVersion>2.50</em:maxVersion>
+       <em:maxVersion>2.48a1</em:maxVersion>
      </Description>
     </em:targetApplication>