Appears to me to be a bug and I've reported it in Bugzilla.
Check About::Plug-ins and I suspect you won't have any Java plug-ins
showing.
I found a fix in the plug-ins news group. However, I just did a
nightly-build install and it replaced the all.js file, so I had to do it
again.
Add the following line to your Mozilla/defaults/all.js file:
pref("plugin.do_JRE_Plugin_Scan",true);
Mike Koenecke wrote:
> I've noted that Javascript is simply not working in 0.9.4, unlike
> earlier versions. I assume I did something wrong on installation or
> something. How can I get it back up and running?
> --
> Mike Koenecke
> to reply, change "nowhere" to "home"