title: RSelenium using Docker and Firefox, Browser Not Opening on Mac
body: <p>I am trying to use RSelenium with Docker, and everything appears to be working, except that I cannot see the firefox browser. I don't think there is anything in my code requiring it to be headless, but that must be the case. Is there a way to make it viewable like it was when using <code>RSelenium::startServer()</code> ?</p>
  
  <p>I installed docker via the instructions in this article, <a href="https://www.raynergobran.com/2017/01/rselenium-mac-update/" rel="nofollow noreferrer">https://www.raynergobran.com/2017/01/rselenium-mac-update/</a></p>
  
  <p>I went to terminal and typed in: <code>docker run -d -p 4445:4444 selenium/standalone-firefox</code> without issue.</p>
  
  <p>I go to R and run this code:</p>
  
  <pre><code>library(RSelenium)
  remDr &lt;- remoteDriver(port=4445L, browserName = "firefox")
  remDr$open()
  remDr$getStatus()
  remDr$navigate("https://www.google.com/")
  remDr$getCurrentUrl()
  </code></pre>
  
  <p>The output from the last command is as expected: </p>
  
  <pre><code>[[1]]
  [1] "https://www.google.com/"
  </code></pre>
  
  <p>When looking at the output after <code>remDr$open()</code>, headless is set to false:</p>
  
  <pre><code>[1] "Connecting to remote server"
  $`moz:profile`
  [1] "/tmp/rust_mozprofile.EQnMfPLPKS4l"
  
  $rotatable
  [1] FALSE
  
  $timeouts
  $timeouts$implicit
  [1] 0
  
  $timeouts$pageLoad
  [1] 300000
  
  $timeouts$script
  [1] 30000
  
  
  $pageLoadStrategy
  [1] "normal"
  
  $`moz:headless`
  [1] FALSE
  
  $`moz:accessibilityChecks`
  [1] FALSE
  
  $acceptInsecureCerts
  [1] FALSE
  
  $browserVersion
  [1] "58.0.2"
  
  $platformVersion
  [1] "4.9.60-linuxkit-aufs"
  
  $`moz:processID`
  [1] 741
  
  $browserName
  [1] "firefox"
  
  $platformName
  [1] "linux"
  
  $`moz:webdriverClick`
  [1] TRUE
  
  $webdriver.remote.sessionid
  [1] "bfa2d87a-67d3-4e5e-838b-e6894a90dd5c"
  
  $id
  [1] "bfa2d87a-67d3-4e5e-838b-e6894a90dd5c"
  </code></pre>
  
  <p>Again, the browser is not viewable on my screen but I'd like it to be. </p>
  
  <p>I am running El Capitan 10.11.6.</p>
  
  <p>Thank you for your help.</p>