From bug 932296, comment 12: " Please file a bug about this. Clearly DetermineElementToMoveFocus needs to take the pref into account for example. The OSX system pref should only be used when accessibility.tabfocus is unset according to the documentation: https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/accessibility.tabfocus " Testcase is for for Mac OSX only, Full Keyboard access needs to be checked for Textboxes and lists only. Steps to reproduce: - Install SpecialPowers extension: http://people.mozilla.org/~mwargers/extensions/specialpowers/specialpowers_working.xpi - Go to http://people.mozilla.org/~mwargers/tests/dom/focus/accessibility.tabfocus.htm - Press the tab key multiple times Expected result: - The green box should not receive focus outline Actual result: - The green box receives focus outline while tabbing.

https://bugzilla.mozilla.org/show_bug.cgi?id=1472046 Move all DOM bugs that haven’t been updated in more than 3 years and has no one currently assigned to P5. If you have questions, please contact :mdaly.