How to enable iceweasel in debian4.0 to support java

For details about how to enable iceweasel in debian4.0 to support the java-Linux Release Technology-Debian information, see the following. When I knew that debian had already exceeded 4.0, I couldn't wait to back up the hard disk. Download ISO and start installation. The installation is still smooth. The 4.0 feature has been improved a lot, but I found that iceweasel is installed by default in the browser. It looks like firefox. I think it may be a core tool, for project reasons, I need to install java support. I thought I had a lot of experience installing the java Plug-in when I used 3.0. I should do it easily this time. But I did not expect it to fail.

Before using 3.0, mozilla is installed by default. You only need to add a link to jre/plugin/usr/lib/mozilla/plugins /. The plug-in is enough. I didn't expect it to be loaded this time. I went to the Internet and checked it. Someone said it was in the user's main directory ~ /. Add mozilla/plugins. I tried it as I did, and it was successful. It's really strange. I cannot try it in the installation directory. Can I do it in the user's main directory? I don't know why. You can use it first. Let's look at the cause later.