Can't load any web pages

[krisyhong]

Hi, I'm new to RSelenium and Selenium in general. I've installed RSelenium-Docker, but I can't get any sites to load.

Here is the code I'm using:

rD <- remoteDriver(port=4567L, browserName='firefox')
rD$open()
rD$navigate("http://www.google.com/")
rD$screenshot(display=TRUE)

And here are the outputs:

$remoteServerAddr
[1] "localhost"

$port
[1] 4567

$browserName
[1] "firefox"

$version
[1] ""

$platform
[1] "ANY"

$javascript
[1] TRUE

$nativeEvents
[1] TRUE

$extraCapabilities
list()

> rD$open()
[1] "Connecting to remote server"
$acceptInsecureCerts
[1] FALSE

$browserName
[1] "firefox"

$browserVersion
[1] "70.0"

$`moz:accessibilityChecks`
[1] FALSE

$`moz:buildID`
[1] "20191016161957"

$`moz:geckodriverVersion`
[1] "0.26.0"

$`moz:headless`
[1] FALSE

$`moz:processID`
[1] 586

$`moz:profile`
[1] "/tmp/rust_mozprofile1O5gLK"

$`moz:shutdownTimeout`
[1] 60000

$`moz:useNonSpecCompliantPointerOrigin`
[1] FALSE

$`moz:webdriverClick`
[1] TRUE

$pageLoadStrategy
[1] "normal"

$platformName
[1] "linux"

$platformVersion
[1] "4.15.0-70-generic"

$rotatable
[1] FALSE

$setWindowRect
[1] TRUE

$strictFileInteractability
[1] FALSE

$timeouts
$timeouts$implicit
[1] 0

$timeouts$pageLoad
[1] 300000

$timeouts$script
[1] 30000


$unhandledPromptBehavior
[1] "dismiss and notify"

$webdriver.remote.sessionid
[1] "9c7037ea-5bc2-4502-9a1a-9dc6fae56fd8"

$id
[1] "9c7037ea-5bc2-4502-9a1a-9dc6fae56fd8"

> rD$navigate("http://www.google.com/")

Selenium message:Reached error page: about:neterror?e=dnsNotFound&u=http%3A//www.google.com/&c=UTF-8&f=regular&d=We%20can%E2%80%99t%20connect%20to%20the%20server%20at%20www.google.com.
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:25:53'
System info: host: '853da07b17cb', ip: '172.17.0.2', os.name: 'Linux', os.arch: 'amd64', os.version: '4.15.0-70-generic', java.version: '1.8.0_222'
Driver info: driver.version: unknown

Error: 	 Summary: UnknownError
 	 Detail: An unknown server-side error occurred while processing the command.
 	 class: org.openqa.selenium.WebDriverException
	 Further Details: run errorDetails method

The screenshot shows "Hmmm. We're having trouble finding that site. We can't connect to the server at www.google.com"

Any help is greatly appreciated, thanks!