CentOS7.6中root用户启动firefox报错（其他用户模式下可以正常启动）_running firefox as root in a regular user's sessio

错误提示如下：

[root@localhost ma]# firefox
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.
Running without a11y support!
Running Firefox as root in a regular user's session is not supported.  ($XDG_RUNTIME_DIR is /run/user/1000 which is owned by ma.)

报错过程：

卸载自带firefox浏览器（同样root下无法启动），然后解压官方软件包到目录/opt/，可以启动正常，重启后继续报上面的错误。

解决方案：

输入   sudo -i                          #用于加载用户变量

附带问题：

启动时提示：Running without a11y support!

但可以正常运行，暂无解决方案。

[root@localhost ~]# firefox
Running without a11y support!