How do I disable Firefox logging in Selenium using Geckodriver?

Question

I am using:

firefox version 50.1.0
geckodriver version 0.11.1
selenium-java 3.0.1

I have tried

FirefoxProfile profile = new FirefoxProfile();
profile.setPreference("webdriver.log.browser.ignore", true);
profile.setPreference("webdriver.log.driver.ignore", true);
profile.setPreference("webdriver.log.profiler.ignore", true);
FirefoxDriver driver = new FirefoxDriver();

and

LoggingPreferences preferences = new LoggingPreferences();
preferences.enable(LogType.BROWSER, Level.OFF);
preferences.enable(LogType.CLIENT, Level.OFF);
preferences.enable(LogType.DRIVER, Level.OFF);
preferences.enable(LogType.PERFORMANCE, Level.OFF);
preferences.enable(LogType.SERVER, Level.OFF);
DesiredCapabilities capabilities = DesiredCapabilities.firefox();
capabilities.setCapability(CapabilityType.LOGGING_PREFS, preferences);
FirefoxDriver driver = new FirefoxDriver(capabilities);

neither of these methods does anything to stop logging. Here is console output if that helps somehow:

first method: http://pastebin.com/23nate2G
second method: http://pastebin.com/NwmWEeXT

For those wondering, i have log4j 1.2.17 in my pom.xml but have no log4j.properties or log4j.xml and I do not use it at all.

To clarify: when I say logging I mean the console output in IntelliJ IDEA. I am using Java.

Why are u using geckodriver ? It's needed for Firefox ? oh ok got it, it's new in selenium 3 — Pascal Heraud, Dec 29 '16 at 22:11
If I'm not mistaken, Geckodriver is needed for Firefox with selenium 3.0.0 and up — maxbfuer, Dec 29 '16 at 22:12
Possible duplicate of [How to turn off the Marionette/gecko driver logs in selenium 3](https://stackoverflow.com/questions/41696695/how-to-turn-off-the-marionette-gecko-driver-logs-in-selenium-3) — Suresh Kumar, Aug 02 '18 at 04:55

score 16 · Accepted Answer · edited Sep 19 '17 at 19:48

16

To not see the logs in the console you can use the following:

System.setProperty("webdriver.gecko.driver","src/main/resources/drivers/geckodriver.exe");
System.setProperty(FirefoxDriver.SystemProperty.DRIVER_USE_MARIONETTE,"true");
System.setProperty(FirefoxDriver.SystemProperty.BROWSER_LOGFILE,"/dev/null");

return new FirefoxDriver();

edited Sep 19 '17 at 19:48

answered Sep 19 '17 at 19:26

Michael Medina

566
5
5

1

How would I set the marionette log level to "warn"? – Jonathan Sep 22 '18 at 21:52
From https://seleniumhq.github.io/selenium/docs/api/java/org/openqa/selenium/firefox/FirefoxDriver.SystemProperty.html#BROWSER_LOGFILE, `BROWSER_LOGFILE` defines the location of the file where Firefox log should be stored --> but I don't see the logfile under /dev/null (this file does not exist) Does /dev/null save it to nowhere? – IceTea Apr 01 '19 at 06:44
@IceTea checkout this: https://en.wikipedia.org/wiki/Null_device `/dev/null` discards everything, its like a trash – Daniel Eisenreich Nov 19 '19 at 06:52

score 6 · Answer 2 · answered Mar 09 '17 at 15:26

6

You can define the desired logging level over command line in geckodriver.exe.

geckodriver.exe -help    
USAGE:
    geckodriver.exe [FLAGS] [OPTIONS]   
...
OPTIONS:
        --log <LEVEL>
            Set Gecko log level [values: fatal, error, warn, info, config,
            debug, trace]

If you use geckodriver from selenium, you have two option:

Start geckodriver.exe separately with custom arguments, and use it from selenium over RemoteWebDriver
Create a custom wrapper, to add extra parameters to geckodriver.exe

Example geckodriver wrapper bat file (for windows):

@ECHO OFF
ECHO Starting geckodriver: %0 %*
.\GeckoDriver\geckodriver.exe --log fatal %* > NUL 2>&1

In java you can define the geckodriver executable path, over webdriver.gecko.driver system property:

System.setProperty("webdriver.gecko.driver", "c:/selenium/geckodriver/gdrvwrapper.bat");

answered Mar 09 '17 at 15:26

voji

483
4
8

I went with this answer but the setting the log level didn't do anything for me on linux. It worked because the output is redirected to null. You can try this by not adding the > NUL 2>& portion. I added the linux version below – mancocapac Sep 16 '17 at 20:36
Is the bat file still needed? or is there a way to do this programmatically? – Arya Oct 22 '17 at 00:50
System properties allow you to do it pragmatically. see the other answer(s) – Nicholas DiPiazza Mar 07 '18 at 00:35
How would I add geckodriver log level from java? – Jonathan Sep 22 '18 at 21:54

score 5 · Answer 3 · edited Sep 22 '18 at 21:55

5

Just do this

System.setProperty(FirefoxDriver.SystemProperty.DRIVER_USE_MARIONETTE,"true");
System.setProperty(FirefoxDriver.SystemProperty.BROWSER_LOGFILE,"/dev/null");
driver = new FirefoxDriver();

edited Sep 22 '18 at 21:55

Jonathan

6,741
7
52
69

answered Feb 27 '18 at 17:50

Akash

115
2
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How would one set the log level to `warn`? – Jonathan Sep 22 '18 at 21:56

score 3 · Answer 4 · edited Jun 14 '20 at 09:03

I am using headless Firefox driver in C#.
To disable geckoDriver logging console, below code it seems to be working for me:

FirefoxDriverService service = FirefoxDriverService.CreateDefaultService(Directory.GetCurrentDirectory());
service.HideCommandPromptWindow = true;
FirefoxOptions options = new FirefoxOptions();
options.AddArguments("--headless");
options.LogLevel = FirefoxDriverLogLevel.Fatal;
WebDriver = new FirefoxDriver(service, options);

score 2 · Answer 5 · answered Feb 03 '19 at 08:29

2

For selenium 3.14.0 , this is working

System.setProperty(FirefoxDriver.SystemProperty.BROWSER_LOGFILE,"/dev/null");

answered Feb 03 '19 at 08:29

Shantonu

1,280
13
12

1

System is coming from jdk, make sure your evironment has jdk installed and in the path – Shantonu Apr 17 '23 at 20:41

score 0 · Answer 6 · answered Apr 18 '17 at 09:11

  GeckoDriverService gecko = new GeckoDriverService(new File("c:/selenium/geckodriver.exe"), 4444, ImmutableList.of("--log=fatal"), ImmutableMap.of());
  gecko.sendOutputTo(new FileOutputStream("gecko_log.txt"));
  gecko.start();

  FirefoxOptions opts = new FirefoxOptions().setLogLevel(Level.OFF);
  DesiredCapabilities capabilities = opts.addTo(DesiredCapabilities.firefox());
  capabilities.setCapability("marionette", true);
  driver = new FirefoxDriver(gecko, capabilities);

I get an error AND a deprecation warning even if I change it not to give errors anymore. This must be an old version of Selenium — Jonathan, Sep 22 '18 at 21:59

score 0 · Answer 7 · answered Sep 16 '17 at 20:42

This is the linux version for @voji answer above. Note as I said above in the comment. I don't believe the --log fatal does anything, at least not on linux. However the redirect to NULL works well enough for me

"webdriver.gecko.driver": "/path-to-driver/geckodriver.sh

filename: geckodriver.sh (executable)

#! /bin/bash
echo " ARGS: " $@
geckodriver --log fatal "$@" > /dev/null 2>&1

score 0 · Answer 8 · answered Jun 17 '20 at 09:29

This might be a bit hacky but it can quickly get the job done without any coding required. Given that you know the exact location of your file and you run your code on Linux you can just cd into that dir and

rm geckodriver.log
ln -s /dev/null geckodriver.log

score 0 · Answer 9 · answered Nov 06 '20 at 10:23

0

profile.setPreference("webdriver.log.init", true);

works, because it fools the webdriver into believing the log has already been initialized, so it won't initialize it and no log will be produced.

answered Nov 06 '20 at 10:23

user1593165

503
3
6

How do I disable Firefox logging in Selenium using Geckodriver?

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