RSelenium - rsDriver(browser = "firefox") -> Conection Refused - r

Question

I'm trying to use Selenium for the first time in my computer. But I'm having an error in the first line:
My code:
library(RSelenium)
rD <- rsDriver(browser = "firefox")
Error message:
checking Selenium Server versions: BEGIN: PREDOWNLOAD BEGIN: DOWNLOAD
BEGIN: POSTDOWNLOAD checking chromedriver versions: BEGIN: PREDOWNLOAD
BEGIN: DOWNLOAD BEGIN: POSTDOWNLOAD checking geckodriver versions:
BEGIN: PREDOWNLOAD BEGIN: DOWNLOAD BEGIN: POSTDOWNLOAD checking
phantomjs versions: BEGIN: PREDOWNLOAD BEGIN: DOWNLOAD BEGIN:
POSTDOWNLOAD
[1] "Connecting to remote server"
Could not open firefox browser.
Client error message:
Undefined error in httr call. httr output: Failed to connect to localhost port 4567: Conection Refused
Check server log for further details.
Warning message:
In rsDriver(browser = "firefox") : Could not determine server status.
My OS is Linux Mint, 19.3, Cinnamon.
I installed selenium-server-standalone-3.141.59.jar and geckodriver-v0.26.0

Answer 1

Try this FIRST:
suppressWarnings(tryCatch(rm(remDr),error=function(e){}))
suppressWarnings(tryCatch(rD),error=function(e){}))
gc()
#relaunch
library(RSelenium)
rD <- rsDriver(browser = "firefox")
remDr <- rD$client
remDr$navigate("https://www.duckduckgo.com")
Alternatively this:
#make sure lsof is installed on your system:
#sudo apt-get install ssh-askpass lsof
system("kill -9 $(lsof -t -i:4567 -sTCP:LISTEN)")
#might need to be run sudo depending on your system
system("sudo kill -9 $(lsof -t -i:4567 -sTCP:LISTEN)")
#relaunch
library(RSelenium)
rD <- rsDriver(browser = "firefox")
remDr <- rD$client
remDr$navigate("https://www.duckduckgo.com")
If none of that works, you may have installed the wrong geckodriver. Uninstall geckodriver from linux (sudo apt-get remove geckodriver --purge) and uninstall RSelenium from R (remove.packages("RSelenium")). Then DO NOT re-install geckodriver, but make sure you have all firefox dependencies (run sudo apt-get install firefox). Re-install RSelenium (in R), then try re-launching again without manually downloading geckodriver. In this way RSelenium will automatically download the correct geckodriver version.