Selenium WebDriver does not connect with Firefox 20

Question

I'm using selenium-server-standalone-2.28.0.jar . Launched the hub and Launched the listener using the following command

"C:\Program Files (x86)\Java\jre7\bin\Java.exe" -jar selenium-server-standalone-2.28.0.jar -role webdriver -hub http://localhost:4444/grid/register -port 5557 -browser "browserName=firefox",maxInstances=5,platform=WINDOWS,javaScriptEnabled=true,TAKES_SCREENSHOT=true

A blank Firefox window is opened and then following error is displayed:

Execute
System.InvalidOperationException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:
*** LOG addons.manager: Application has been upgraded
*** LOG addons.xpi: startup
*** LOG addons.xpi: Skipping unavailable install location app-system-local
*** LOG addons.xpi: Skipping unavailable install location app-system-share
*** LOG addons.xpi: Ignoring file entry whose name is not a valid add-on ID:         C:\Users\PR~1.GRO\AppData\Local\Temp\anonymous768293325561108937webdriver-profile\extensions\webdriver-staging
*** LOG addons.xpi: checkForChanges
*** LOG addons.xpi-utils: Opening database
*** LOG addons.xpi-utils: Creating database schema
*** LOG addons.xpi: New add-on fxdriver@googlecode.com installed in app-profile
*** Blocklist::_loadBlocklistFromFile: blocklist is disabled
*** LOG addons.xpi: New add-on {972ce4c6-7e08-4474-a285-3208198ce6fd} installed in app-global
*** LOG addons.xpi: New add-on fiddlerhook@fiddler2.com installed in winreg-app-global
*** LOG addons.xpi: New add-on avg@toolbar installed in winreg-app-global
*** LOG addons.xpi: New add-on web2pdfextension@web2pdf.adobedotcom installed in winreg-app-global
*** LOG addons.xpi: Updating database with changes to installed add-ons
*** LOG addons.xpi-utils: Updating add-on states
*** LOG addons.xpi-utils: Writing add-ons list
*** LOG addons.manager: shutdown
*** LOG addons.xpi: shutdown
*** LOG addons.xpi-utils: shutdown
*** LOG addons.xpi-utils: Database closed
*** LOG addons.xpi: startup
*** LOG addons.xpi: Skipping unavailable install location app-system-local
*** LOG addons.xpi: Skipping unavailable install location app-system-share
*** LOG addons.xpi: Ignoring file entry whose name is not a valid add-on ID: C:\Users\PR~1.GRO\AppData\Local\Temp\anonymous768293325561108937webdriver-profile\extensions\webdriver-staging
*** LOG addons.xpi: checkForChanges
*** LOG addons.xpi: No changes found

at OpenQA.Selenium.Remote.RemoteWebDriver.UnpackAndThrowOnError(Response errorResponse) in c:\Projects\WebDriver\trunk\dotnet\src\WebDriver\Remote\RemoteWebDriver.cs:line 1002
at OpenQA.Selenium.Remote.RemoteWebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters) in c:\Projects\WebDriver\trunk\dotnet\src\WebDriver\Remote\RemoteWebDriver.cs:line 844
at OpenQA.Selenium.Remote.RemoteWebDriver.StartSession(ICapabilities desiredCapabilities) in c:\Projects\WebDriver\trunk\dotnet\src\WebDriver\Remote\RemoteWebDriver.cs:line 809
at OpenQA.Selenium.Remote.RemoteWebDriver..ctor(ICommandExecutor commandExecutor, ICapabilities desiredCapabilities) in c:\Projects\WebDriver\trunk\dotnet\src\WebDriver\Remote\RemoteWebDriver.cs:line 85
at OpenQA.Selenium.Remote.RemoteWebDriver..ctor(Uri remoteAddress, ICapabilities desiredCapabilities, TimeSpan commandTimeout) in c:\Projects\WebDriver\trunk\dotnet\src\WebDriver\Remote\RemoteWebDriver.cs:line 117
at OpenQA.Selenium.Remote.RemoteWebDriver..ctor(Uri remoteAddress, ICapabilities desiredCapabilities) in c:\Projects\WebDriver\trunk\dotnet\src\WebDriver\Remote\RemoteWebDriver.cs:line 106
at SHL.Test.Selenium.ScreenShotRemoteWebDriver..ctor(Uri remoteAddress, ICapabilities desiredCapabilities) in C:\Preethi\vs1\WebTest\SeleniumWebTest\Framework\SHL.Test.Selenium\ScreenShotRemoteWebDriver.cs:line 9
at SHL.Test.Selenium.TestContext..ctor(Action testRun, ITestEnvironment testEnvironment, DesiredCapabilities desiredCapabilities) in C:\Preethi\vs1\WebTest\SeleniumWebTest\Framework\SHL.Test.Selenium\TestContext.cs:line 31
at SHL.Test.Selenium.TestBase.InitSelenium(DesiredCapabilities desiredCapabilities, ITestEnvironment testEnvironment, Action testRun) in C:\Preethi\vs1\WebTest\SeleniumWebTest\Framework\SHL.Test.Selenium\TestBase.cs:line 112

On debugging, went to Firefox browser add-ons list and found that Firefox webDriver is incompatible with Firefox 20.0 Current Firefox webdirver version is 2.28.0

Which latest Firefox version can I use or is there any alternative for this issue?

Answer 1

use the latest version instead. for now 2.32.0

see http://docs.seleniumhq.org/download/ or direct download http://selenium.googlecode.com/files/selenium-server-standalone-2.32.0.jar

it works for me

Answer 2

Firefox 20 has only just come out, it will probably take a couple of days for the Selenium devs to fix any compatibility issues that have sprung up.

The latest version of Selenium is 2.31.0 (available here) which will work with Firefox 19.0.2. Any version of Selenium below 2.30.0 will not work with FireFox 19 and upwards so I would suggest you try updating Selenium to the latest version first.

To be clear I have not yet downloaded and tried FireFox 20 so I don't know how compatible Selenium 2.31.0 is with it.

Answer 3

I have Ubuntu 12.04 64bit. Selenium stopped working after the recent update to 20. I was using Eclipse (JDK 7). I changed Eclipse.ini to use JDK 6 instead and it started working. Webdriver hangs once in a while but works most of the time(It could be an issue with the website I'm testing as well). To be safe, I have now disabled Firefox auto updates.