What are you trying to accomplish? Ref: *[[Options window - Tabs panel]] *[[Tabbed browsing]]

The setting in Tools > Options > Tabs: "New pages should be opened in": "a new tab/window" is for links that specify a target window to open the link.<br /> That option allows to divert such links to a new tab instead of a new window.<br /> Links that do not specify a target should open in the current tab.<br /> If that isn't the case then you may have an extension interfering. ---- *http://kb.mozillazine.org/browser.link.open_newwindow *http://kb.mozillazine.org/browser.link.open_newwindow.restriction