During the playback of Web UI tests in IBM Rational Test Workbench (RTW), the test fails to navigate to a URL when Mozilla Firefox is used.
Sometimes, the Mozilla Firefox browser itself does not open.
This problem is mostly seen in the ESR version of the browser.
This failure might be caused by extensions installed in the Mozilla Firefox browser.
Resolving The Problem
Delete the distribution directory located in the Mozilla Firefox installation directory.
You can also uninstall the extensions.
16 June 2018