Do you have this problem with all links in Firefox, or only some links, or only links outside of Firefox? There are some links that use a script method to apply certain limitations or features to a window, such as a specific size or certain toolbars. Firefox lets those launch in a new window. If you want to force those into a new tab as well, here's how: (1) In a new tab, type or paste <strong>about:config</strong> and press Enter. Click the button promising to be careful. (2) In the filter box, type or paste <strong>link.o</strong> and pause while the list is filtered. (3) There are three similarly named preferences for different scenarios, we're going to focus on the second one, but I mention the others in case you have a question when you see them: <strong>(A) browser.link.open_newwindow</strong> - for links in Firefox tabs 3 = divert new window to a new tab (<u>default</u>) 2 = allow link to open a new window 1 = force new window into same tab <strong>(B) browser.link.open_newwindow.restriction</strong> - for links in Firefox tabs - change this from 2 to 0 (zero) '''0 = apply the setting under (A) to ALL new windows''' (even script windows) 2 = apply the setting under (A) to normal windows, but NOT to script windows with features (<u>default</u>) 1 = override the setting under (A) and always use new windows <strong>(C) browser.link.open_newwindow.override.external</strong> - for links in other programs -1 = apply the setting under (A) to external links (<u>default</u>) 3 = open external links in a <u>new tab</u> in the last active window 2 = open external links in a <u>new window</u> 1 = open external links in the <u>last active tab</u> replacing the current page Does setting that second preference to a value of 0 make any difference?