With the last release of Firefox 21 on Unix (Solaris, Linux), the MIME type description of Java Plug-in displayed as HTML entities such as:

application/x-java-vm Java&#153 Plug-in
application/x-java-applet Java&#153 Plug-in Applet
application/x-java-bean Java&#153 Plug-in JavaBeans
application/x-java-applet;version=1.1 Java&#153 Plug-in
application/x-java-bean;version=1.1 Java&#153 Plug-in
...
....


This only happens with Java Plug-in, not with other Plug-ins.
Mozilla confirmed that Java plugin should use UTF8 instead of HTML entities. With the latest Firefox 21 release, it does not parse the plugin description as HTML


*** Steps to reproduce:
On a Solaris or Linux machine
1) Installed Java Plug-in 7u25
2) Register Java Plug-in with Firefox 21 as making the sym link libnpjp2.so from ~/.mozilla/plugins

Open Firefox, about:plugins, part of the MIME Type description displayed as mentioned above
This issue is not specific to 7u25 but specific to the latest Firefox 21+