title: R: RSelenium won't start
body: <p>When I run the code below, the error msg pops up and it won't start the session. I have included the version infor below too.
  Thanks in advance.</p>
  
  <p><a href="https://i.stack.imgur.com/ql7qx.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ql7qx.jpg" alt="enter image description here"></a></p>
  
  <pre><code>rm(list=ls(all=TRUE))
  cat("\014")
  library(RSelenium)
  startServer()
  remDr &lt;- remoteDriver(port = 4444,
                        browserName = "firefox") 
  remDr$open()[![enter image description here][1]][1]
  
  
  
  [1] "Connecting to remote server"
  Error:   Summary: UnknownError
       Detail: An unknown server-side error occurred while processing the command.
       class: org.openqa.selenium.firefox.NotConnectedException
  
  
  &gt; remDr$getStatus()$build
  $version
  [1] "2.53.0"
  
  $revision
  [1] "35ae25b"
  
  $time
  [1] "2016-03-15 17:00:58"
  </code></pre>
  
  <p>[UPDATE]: I reinstalled my firefox (48.0.2) , now when I run the same code, the "Firefox has stopped working" msg is gone, instead it opens a blank page, but I still see the same error msg in R. Please assist, thanks!</p>