I\'m getting this error when I\'m trying to run my selenium test using MVN test command line. Curiously, I tried it 3 days ago and it ran successfully:
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Selenium v2.21 does not support Firefox 17. In fact, Firefox 17 is only supported with version v2.27 which was released a couple of days ago.
Either downgrade Firefox or update Selenium.
May or may not be the reason for this particular error, but you must do one of the above to even have half a chance of getting it to work.