Selenium is not running with Firefox 12.0

Question

Selenium is not working after Firefox upgraded to latest version 12.0. It is failing with below message. Please advise, it is still working fine if i use older version of firefox.

org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:
*** 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\Abdul\AppData\Local\Temp\anonymous869859993705622974webdriver-profile\extensions\webdriver-staging
*** LOG addons.xpi: checkForChanges
*** LOG addons.xpi: No changes found

    at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:95)
    at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:157)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:93)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:136)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:78)
    at Google.Open_Google_Firefox.Test_Google_FireFox(Open_Google_Firefox.java:13)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:702)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:894)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1219)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
    at org.testng.TestRunner.privateRun(TestRunner.java:768)
    at org.testng.TestRunner.run(TestRunner.java:617)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
    at org.testng.SuiteRunner.run(SuiteRunner.java:240)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:87)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1185)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1110)
    at org.testng.TestNG.run(TestNG.java:1022)
    at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:109)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:202)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:173)
FAILED CONFIGURATION: @AfterMethod tearDown

.. .. .. ..

Answer 1

I had this same error with 2.16. Upgrading to 2.21.2 allowed me to use Firefox 12.

Answer 2

Uninstalling the current version and re-installing the previous version of Firefox solves this issue.

This is because, the latest version of Firefox is not integrated with the current Selenium version.