User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Comodo_Dragon/220.127.116.11 Chrome/9.0.597.98 Safari/534.13 Build Identifier: Firefox 4.0 (release candidate) Checking or unchecking the "Tabs on Top" in the Options menu doesn't apply to all windows when multiple windows of Firefox are open. Reproducible: Always Steps to Reproduce: 1.Have at least two open windows. 2.Check/uncheck "Tabs on Top" in the Options menu. 3.Switch to the other window. Actual Results: Tabs on Top is enabled/disabled only in the window where it was enabled/disabled. Other windows will still have the previous setting. Expected Results: I expected it to apply the option to all windows. Workarounds: 1) Restart Firefox so that the setting is applied to all windows. 2) Enable/disable Tabs on Top in each window.