diff --git a/extensions/firefox/install.rdf b/extensions/firefox/install.rdf
index a8177834..a5094c19 100644
--- a/extensions/firefox/install.rdf
+++ b/extensions/firefox/install.rdf
@@ -14,7 +14,7 @@
       <Description>
        <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
        <em:minVersion>6.0</em:minVersion>
-       <em:maxVersion>14.0a1</em:maxVersion>
+       <em:maxVersion>15.0a1</em:maxVersion>
      </Description>
     </em:targetApplication>
 
@@ -23,7 +23,7 @@
       <Description>
        <em:id>{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}</em:id>
        <em:minVersion>2.1.*</em:minVersion>
-       <em:maxVersion>2.9.*</em:maxVersion>
+       <em:maxVersion>2.12a1</em:maxVersion>
      </Description>
     </em:targetApplication>
     <em:bootstrap>true</em:bootstrap>