Firefox浏览器在软件开发、系统调试过程中发挥着重要的作用，因此在Centos7调试中，我也使用了Firefox测试Apache设置的站点，但在Firefox &时无法打开。
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Failed to open connection to "session" message bus: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
从上面的错误，系统提示没有装x11，安装方法如下
#yum install -y xorg-x11-xauth
继续打开时，提示乱码
安装中文字库
#yum -y install wqy-zenhei-fonts*
安装完成后，重新打开
#firefox &
