Bug-Debian: http://bugs.debian.org/634667 
Bug-Debian: http://bugs.debian.org/639601
Bug-Debian: http://bugs.debian.org/645117

Tested to work with versions 6 and 7 as well.

--- a/plugin/install.rdf
+++ b/plugin/install.rdf
@@ -15,7 +15,7 @@
 			<Description>
 				<em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
 				<em:minVersion>3.0</em:minVersion>
-				<em:maxVersion>5.*</em:maxVersion>
+				<em:maxVersion>8.*</em:maxVersion>
 			</Description>
 		</em:targetApplication>
 
