I\'m using Selenium Client 2.4.0 on Mac 10.6.6 with Firefox 5. Using the WebBackedSeleniumDriver, I\'m running a \"selenium.getEval\" command that causes a Firefox warning,
dom.max_script_run_time
is the right preference but it only applies to web pages. Browser UI (and extensions like fxdriver are part of it) are restricted by the preference dom.max_chrome_script_run_time
however (default value is 20 seconds). You should set it to 0 as well.
Documentation: https://developer.mozilla.org/en/Preferences/Mozilla_preferences_for_uber-geeks#DOM_preferences