Need advise with Java installation

After trying again few games in nintendo8.com website still without sound I'm thinking on trying Oracle's Java for real now. But again, questions aroused...

I had made a thread about this before, but reviving it may not be good, besides I first looked for some info:
http://humairahmed.com/blog/?p=7398
http://tutorialforlinux.com/2013/12/...it-easy-guide/
http://tutorialforlinux.com/2013/12/...ux-easy-guide/
Quite different to Java SDB, seemingly it's yet unfixed/outdated...

According to links, I can keep openJDK and use update-alternatives. But IcedTea plugin is still removed. I guess it's uncompatible with Oracle's plugin...


1. If I'm not developer which one should I install, JRE or still JDK?

2. Is Oracle's plugin indeed compatible with openJDK as well?

3. Why are java plugins being unlinked first in the 3rd link above?

4. When installing plugin locally for Firefox or SeaMonkey -Gecko based-, is ~/.mozilla/plugins really needed to be created? (It doesn't exist by default). What is ~/.mozilla/extensions directory for?

5. If I wanted to do system-wide installation, where should I point the symbolic link to, /usr/lib64/mozilla/extensions or /usr/lib64/browser-plugins? Would it work for Firefox as well?

6. Overall, is that info good to go or should I stick with Tsu2's scripts?


Oh, and in the other thread it was mentioned that nintendo8's online games worked with sound in java mode, but without sound in javascript. Could "java mode" be Oracle's Java and "javascript" openJDK? That would explain it...

By the way, I've still remained with the sibling page snessy.com inquiry due to this *ugly* issue, in case someone could say something:
http://forums.opensuse.org/showthrea...41#post2587141