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org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:

Alexei Levenkov
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Animesh
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    Possible duplicate of [Webdriver Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms](http://stackoverflow.com/questions/12588082/webdriver-unable-to-connect-to-host-127-0-0-1-on-port-7055-after-45000-ms) – mrun Jan 14 '16 at 05:57
  • try to downgrade to selenium 2.48 – Leon Barkan Jan 14 '16 at 07:00

1 Answers1

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This is a case of the release cadences of both Firefox and Selenium Webdriver. When Firefox release a new version, it generally isn't supported by Selenium vlatest. My recommendation from experience is:

  • Disable Firefox Automatic Updates (Options->Advanced->Update)
  • Manually keep Firefox as up-to-date as possible without breaking Selenium Compatibility (unfortunately as far as I know, there isn't a definitive compatibility matrix)
  • Always try and keep Selenium up-to-date

This is particularly important for any Selenium boxes used as part of a CI/CD pipeline, which will otherwise auto update and fail.

For downgrading Firefox, Mozilla provide a directory of older versions:

https://ftp.mozilla.org/pub/firefox/releases/

James McKenzie
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