从Mozilla的官方网站下了最新版的Firefox，是一个压缩包，文件名firefox-1.0.4.installer.tar.gz。解压出来，可执行文件是firefox-installe和firefox-installer-bin。
接下来的事情是，双击firefox-installer-bin，没有反应；切换到控制台下./firefox-installer，有错误提示了： error while loading shared libraries: libstdc++.so.5:
cannot open shared object file: No such file or directory 上网找到一个关于libstdc++.so.5的解释：
libstdc++.so.5: cannot open shared object file: No such file or directory
Problem: An application is running on Linux 7.x which uses gcc 3.2.x. It gets one of the following error messages:
libstdc++.so.5: cannot open shared object file: No such file or directory
libgcc_s.so.1: cannot open shared object file: No such file or directory
Explanation:
libstdc++.so.5 (the library for gcc 3.2.x) is installed in
/usr/local/lib However, the system will only seach /usr/lib (where the
2.95.0 and other older libraries are stored).
Solution: Create symbolic links to make the libraries appear in the old folder:
ln -s /usr/local/lib/libstdc++.so.5 /usr/lib/libstdc++.so.5
ln -s /usr/local/lib/libgcc_s.so.1 /usr/lib/libgcc_s.so.1
如法建立两个链接，又出现了这样的错误：
error: Failed dependencies:
libstdc++.so.5()is needed by firefox-installer-bin
libstdc++.so.5(CXXABI_1.2)is needed by firefox-installer-bin
libstdc++.so.5(GLIBCPP_3.2)(64bit) is needed by firefox-installer-bin
重装libstdc++,依然如此。
上Google搜了下，在Fedora的邮件列表中找到了答案：
Fedora has moved beyond "libstdc++.so.5", in order to install you'll need to
install the "compat-libstdc++-8-3.3.4.2" rpm which should fulfill the requirements:
$ rpm -q --provides compat-libstdc++
libg++.so.2.7.2
libstdc++-libc6.1-1.so.2
libstdc++-libc6.1-1.so.2(GCC.INTERNAL)
libstdc++-libc6.2-2.so.3
libstdc++-libc6.2-2.so.3(GLIBCPP_2.96)
libstdc++-libc6.2-2.so.3(GLIBCPP_2.96_1)
libstdc++-libc6.2-2.so.3(GLIBC_2.0)
libstdc++-libc6.2-2.so.3(GLIBC_2.1)
libstdc++.so.2.7.2
libstdc++.so.2.8
libstdc++.so.2.9
libstdc++.so.2.9(GCC.INTERNAL)
libstdc++.so.5
libstdc++.so.5(CXXABI_1.2)
libstdc++.so.5(CXXABI_1.2.1)
libstdc++.so.5(CXXABI_1.2.2)
libstdc++.so.5(GLIBCPP_3.2)
libstdc++.so.5(GLIBCPP_3.2.1)
libstdc++.so.5(GLIBCPP_3.2.2)
libstdc++.so.5(GLIBCPP_3.2.3)
libstdc++.so.5(GLIBCPP_3.2.4)
compat-libstdc++ = 8-3.3.4.2
看来在RHEL中应该和Redora是一样的情况。于是安装compat-libstdc++，再双击firefox-installer-bin，OK，图形的安装界面出来了。
下一步。
下一步。
然后，再次出现问题:
Fatal Error [-618] Couldn't open xpistub library.
在国外一个论坛看到一个人的建议:
Use a terminal to
launch the installer ( do "cd firefox-installer", then
"./firefox-installer") and see what the output is in the terminal. It's
likely it's a lib problem (glibc?) with rh ( 8.0 is an old distro, the
precompiled firefox may not be able to run on that unless you do some
hefty upgrading).
原来只能通过在命令行下./firefox-installer来启动安装程序,否则就会报错。于是打开终端，cd firefox && ./firefox-installer。OK！终于搞定。