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Editorial Team
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Editorial Team
Asked: June 3, 20262026-06-03T13:49:46+00:00 2026-06-03T13:49:46+00:00

Selenium is not working after Firefox upgraded to latest version 12.0. It is failing

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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

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1 Answer

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  1. Editorial Team
    Editorial Team
    2026-06-03T13:49:47+00:00Added an answer on June 3, 2026 at 1:49 pm

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

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