sample-debug-actors compatibility fix

upgrade.patch

diff --git a/install.rdf b/install.rdf
index 24209ac..32758b2 100644
--- a/install.rdf
+++ b/install.rdf
@@ -12,7 +12,7 @@
       <Description>
         <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id> <!-- Firefox -->
         <em:minVersion>7.0a1</em:minVersion>
-        <em:maxVersion>7.0a1</em:maxVersion>
+        <em:maxVersion>8.0a1</em:maxVersion>
       </Description>
     </em:targetApplication>
   </Description>