之前是用的包管理器装的,位置

cyper@cyper-pc:~/Downloads$ ls -l `which firefox` lrwxrwxrwx 1 root root 25 Jun  9 06:08 /usr/bin/firefox -> ../lib/firefox/firefox.sh cyper@cyper-pc:~/Downloads$ 

cyper@cyper-pc:~/Downloads/java_soft$ sudo apt-get remove --purge firefox [sudo] password for cyper:  Reading package lists... Done Building dependency tree        Reading state information... Done The following packages were automatically installed and are no longer required:   python-markdown retext-wpgen Use 'apt-get autoremove' to remove them. The following packages will be REMOVED:   firefox* firefox-globalmenu* firefox-gnome-support* 说明：apt-get remove --purge package表示删除包，包括删除配置文件等 下载并安装

cd ~/Downloadswget http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/33.1.1/linux-x86_64/en-US/firefox-33.1.1.tar.bz2tar -xjvf firefox-33.1.1.tar.bz2sudo rm -rf /opt/firefox* #这步可选sudo mv firefox /opt/firefox33.1sudo ln -sf /opt/firefox33.1/firefox /usr/bin/firefox

tar: x表示解压,v表示verbose, j表示格式为bzip2, f指定归档文件

ln: s表示软链接,f表示如果目标文件存在，强制替换.

然后我们可以直接在命令行输入firefox启动浏览器了

查看新位置

cyper@cyper-pc:~/Downloads/java_soft$ ls -l `which firefox`

lrwxrwxrwx 1 root root 24 Nov 17 23:27 /usr/bin/firefox -> /opt/firefox33.1/firefox cyper@cyper-pc:~/Downloads/java_soft$ 

参考：http://www.itworld.com/article/2695595/enterprise-software/install-firefox-30-in-ubuntu-14-04.html