Change the location of new tab opened by link from existing tab in Firefox

As of Firefox 3.6.3, the location of new tab opened by link from existing tab, is next to the tab from which it is opened.

TheExistingTab   NewTab   OtherTabOne   OtherTabTwo   OtherTabThree

In Firefox 3.5, the new tab opened by link from existing tab, is at the right of all current tab.

TheExistingTab   OtherTabOne   OtherTabTwo   OtherTabThree   NewTab

How to change the way new tab opened by link from existing tab as Firefox 3.5

Go to about:config, search tabs, find browser.tabs.insertRelatedAfterCurrent, its default value is true, double-click it to change its value to false, now you're done. If you wanna restore the original setting, double-click it again to change its value to true. You don't need to restart Firefox for the change to take effect, the change will take effect after changing the value from true to false or false to true.