I get my firefox by download firefox-7.0.1.tar.bz2 and then unzip it

I try to follow this link http://digitizor.com/2009/01/05/how-to-make-the-java-plugin-work-on-firefox-in-fedora-10-linux-distro/ but fail

You need the Java 2 plugin (libnpjp2.so).
libjavaplugin.so is the classic Java plugin and doesn't work in current Firefox versions.

• http://www.oracle.com/technetwork/java/javase/manual-plugin-install-linux-136395.html

where is the "Firefox application's directory, in the plugins subdirectory"?

[admin@localhost ~]$ cd firefox7 [admin@localhost firefox7]$ ls -l total 29164 -rw-r--r-- 1 admin admin 2153 2011-09-28 19:04 application.ini -rw-r--r-- 1 admin admin 7496 2011-09-28 19:04 blocklist.xml drwxr-xr-x 3 admin admin 4096 2011-09-28 18:59 chrome -rw-r--r-- 1 admin admin 36 2011-09-28 18:59 chrome.manifest drwxr-xr-x 2 admin admin 4096 2011-09-28 18:59 components -rwxr-xr-x 1 admin admin 134132 2011-09-28 19:05 crashreporter -rw-r--r-- 1 admin admin 3665 2011-09-28 18:59 crashreporter.ini -rw-r--r-- 1 admin admin 622 2011-09-28 18:59 crashreporter-override.ini drwxr-xr-x 3 admin admin 4096 2011-09-28 18:59 defaults -rw-r--r-- 1 admin admin 142 2011-09-28 19:04 dependentlibs.list drwxr-xr-x 2 admin admin 4096 2011-09-28 18:59 dictionaries drwxr-xr-x 3 admin admin 4096 2011-09-28 19:04 extensions -rwxr-xr-x 1 admin admin 50064 2011-09-28 19:05 firefox7 -rwxr-xr-x 1 admin admin 50068 2011-09-28 19:05 firefox-bin drwxr-xr-x 2 admin admin 4096 2011-09-28 18:59 hyphenation drwxr-xr-x 2 admin admin 4096 2011-09-28 19:04 icons -rw-r--r-- 1 admin admin 478 2011-09-28 19:05 libfreebl3.chk -rwxr-xr-x 1 admin admin 311768 2011-09-28 19:05 libfreebl3.so -rwxr-xr-x 1 admin admin 5864 2011-09-28 19:05 libmozalloc.so -rwxr-xr-x 1 admin admin 589768 2011-09-28 19:05 libmozsqlite3.so -rwxr-xr-x 1 admin admin 190896 2011-09-28 19:05 libnspr4.so -rwxr-xr-x 1 admin admin 873300 2011-09-28 19:05 libnss3.so -rwxr-xr-x 1 admin admin 383568 2011-09-28 19:05 libnssckbi.so -rw-r--r-- 1 admin admin 478 2011-09-28 19:05 libnssdbm3.chk -rwxr-xr-x 1 admin admin 122232 2011-09-28 19:05 libnssdbm3.so -rwxr-xr-x 1 admin admin 81236 2011-09-28 19:05 libnssutil3.so -rwxr-xr-x 1 admin admin 13808 2011-09-28 19:05 libplc4.so -rwxr-xr-x 1 admin admin 10668 2011-09-28 19:05 libplds4.so -rwxr-xr-x 1 admin admin 128364 2011-09-28 19:05 libsmime3.so -rw-r--r-- 1 admin admin 478 2011-09-28 19:05 libsoftokn3.chk -rwxr-xr-x 1 admin admin 189256 2011-09-28 19:05 libsoftokn3.so -rwxr-xr-x 1 admin admin 167692 2011-09-28 19:05 libssl3.so -rwxr-xr-x 1 admin admin 12204 2011-09-28 19:05 libxpcom.so -rwxr-xr-x 1 admin admin 21458148 2011-09-28 19:05 libxul.so -rwxr-xr-x 1 admin admin 13692 2011-09-28 19:05 mozilla-xremote-client -rw-r--r-- 1 admin admin 4632263 2011-09-28 18:59 omni.jar -rw-r--r-- 1 admin admin 136 2011-09-28 19:04 platform.ini -rwxr-xr-x 1 admin admin 40668 2011-09-28 19:05 plugin-container -rw-r--r-- 1 admin admin 1921 2011-09-28 18:59 precomplete -rw-r--r-- 1 admin admin 177 2011-09-28 18:59 README.txt -rw-r--r-- 1 admin admin 34145 2011-09-28 19:04 removed-files -rwxr-xr-x 1 admin admin 10380 2011-09-28 19:04 run-mozilla.sh drwxr-xr-x 2 admin admin 4096 2011-09-28 18:59 searchplugins -rw-r--r-- 1 admin admin 825 2011-09-28 19:04 Throbber-small.gif -rw-r--r-- 1 admin admin 6 2011-09-28 18:59 update.locale -rwxr-xr-x 1 admin admin 118192 2011-09-28 19:05 updater -rw-r--r-- 1 admin admin 124 2011-09-28 18:59 updater.ini drwxr-xr-x 3 admin admin 4096 2011-10-26 22:21 updates

finally I solve the problem by cd /usr/lib/mozilla/plugins ln -s /usr/java/jre1.6.0_25/lib/i386/libnpjp2.so

I emphasis again, I really cannot find the mention 2 directory: 1) Firefox application's directory, in the plugins subdirectory. 2) in your home directory, in ~/.mozilla/plugins

the most near is extensions directory, not plugins directory, but I try to link libnpjp2.so to extensions directory and the java plugin still cannot be installed in firefox.

You can create a plugins folder in the Firefox Profile Folder and place a symlink to the libnpjp2.so file in that folder.

• http://kb.mozillazine.org/Profile_folder_-_Firefox

• Help > Troubleshooting Information > Profile Directory: Open Containing Folder

I install firefox 5 and java 1.6.29, fedora 14, I try create the link as follow [Administrator@localhost ~]$ cd ~/.mozilla/plugins [Administrator@localhost plugins]$ ls -l total 0 lrwxrwxrwx. 1 Administrator Administrator 43 Nov 16 04:32 libnpjp2.so -> /usr/java/jre1.6.0_29/lib/amd64/libnpjp2.so [Administrator@localhost plugins]$

but after restart firfox, still cannot find the java plugins, what is the problem?

I add the symbolic link in the following folder [Administrator@localhost /]$ su Password: [root@localhost /]# find / -name 'libnpjp2.so' /home/Administrator/java/jre1.6.0_29/lib/amd64/libnpjp2.so find: `/home/Administrator/.gvfs': Permission denied /home/Administrator/.mozilla/plugins/libnpjp2.so /home/Administrator/.mozilla/firefox/hw67q5aj.default/libnpjp2.so /home/Administrator/.mozilla/firefox/hw67q5aj.default/plugins/libnpjp2.so /usr/java/jre1.6.0_29/lib/amd64/libnpjp2.so /usr/lib/mozilla/plugins/libnpjp2.so [root@localhost /]# but still cannot load java plugin in firefox!!

the screen shot show the link "libnpjp2.so" point to /usr/java/jre1.6.0_29/lib/amd64/libnpjp2.so