pidgin问题，empathy同样

我下载了firefox4的tra.bz2包，请问如何安装啊？
ls 命令里面有：
jerry@skyline:~/下载/firefox$ ls
application.ini libfreebl3.chk libssl3.so
blocklist.xml libfreebl3.so libxpcom.so
chrome libmozalloc.so libxul.so
chrome.manifest libmozsqlite3.so mozilla-xremote-client
components libnspr4.so omni.jar
crashreporter libnss3.so platform.ini
crashreporter.ini libnssckbi.so plugin-container
crashreporter-override.ini libnssdbm3.chk README.txt
defaults libnssdbm3.so removed-files
dependentlibs.list libnssutil3.so run-mozilla.sh
distribution libplc4.so searchplugins
extensions libplds4.so Throbber-small.gif
firefox libsmime3.so update.locale
firefox-bin libsoftokn3.chk updater
icons libsoftokn3.so updater.ini

完全读不懂
麻烦把过程详细传授下

直接运行