Failed

JMRI Web Server.Basic Http requests 7 (from cucumber.runtime.formatter.JUnitFormatter)

Failing for the past 4 builds (Since Failed#3 )
Took 2 sec.

Error Message

org.openqa.selenium.WebDriverException: Cannot find firefox binary in PATH. Make sure firefox is installed. OS appears to be: LINUX
Build info: version: '3.6.0', revision: '6fbf3ec767', time: '2017-09-27T16:15:40.131Z'
System info: host: 'xvm50620.vps.cloud.tagadab.com', ip: '31.172.250.170', os.name: 'Linux', os.arch: 'amd64', os.version: '4.4.0-112-generic', java.version: '1.8.0_181'
Driver info: driver.version: unknown
	at org.openqa.selenium.firefox.FirefoxBinary.<init>(FirefoxBinary.java:116)
	at jmri.util.web.BrowserFactory.getBrowser(BrowserFactory.java:39)
	at jmri.web.WebServerAcceptanceSteps.lambda$new$0(WebServerAcceptanceSteps.java:35)
	at ✽.I am using firefox(file:java/acceptancetest/features/web/WebServer.feature:5)

Stacktrace

Given I am using firefox....................................................failed
When I ask for the url http://localhost:12080/prefs/........................skipped
Then a page with title Directory: /prefs/ | My JMRI Railroad is returned....skipped

StackTrace:
org.openqa.selenium.WebDriverException: Cannot find firefox binary in PATH. Make sure firefox is installed. OS appears to be: LINUX
Build info: version: '3.6.0', revision: '6fbf3ec767', time: '2017-09-27T16:15:40.131Z'
System info: host: 'xvm50620.vps.cloud.tagadab.com', ip: '31.172.250.170', os.name: 'Linux', os.arch: 'amd64', os.version: '4.4.0-112-generic', java.version: '1.8.0_181'
Driver info: driver.version: unknown
	at org.openqa.selenium.firefox.FirefoxBinary.<init>(FirefoxBinary.java:116)
	at jmri.util.web.BrowserFactory.getBrowser(BrowserFactory.java:39)
	at jmri.web.WebServerAcceptanceSteps.lambda$new$0(WebServerAcceptanceSteps.java:35)
	at ✽.I am using firefox(file:java/acceptancetest/features/web/WebServer.feature:5)