运行firefox时提示“libGL error: unable to load driver: swrast_dri.so”页面卡顿：
[root@instance-yl8rup7q ~]# firefox &
[1] 2004
[root@instance-yl8rup7q ~]# Failed to open connection to "session" message bus: /usr/bin/dbus-launch terminated abnormally without any error message
Running without a11y support!
libGL error: unable to load driver: swrast_dri.so
libGL error: failed to load driver: swrast
安装下面两个包，两个libGL错误提示就会没有。
yum install -y mesa-libGLES-devel.x86_64 mesa-dri-drivers