RSelenium - 无法连接到服务器

Question

我已经安装了 docker 并启动了 RSelenium，如下所示：

sudo docker run -d -p 4445:4444 selenium/standalone-firefox

然后我启动一个远程服务器：

remdr <- remoteDriver()
remdr

给出：

$remoteServerAddr
[1] "localhost"

$port
[1] 4444

$browserName
[1] "firefox"

$version
[1] ""

$platform
[1] "ANY"

$javascript
[1] TRUE

$nativeEvents
[1] TRUE

$extraCapabilities
list()

但是当我尝试连接时：

remdr$open()

获取：

[1] "Connecting to remote server"
Error in checkError(res) : 
  Undefined error in httr call. httr output: Failed to connect to localhost port 4444 after 0 ms: Connection refused