Another useful tweak is to turn on the option that forces all popups into tabs rather than new windows. This is an option in FireFox itself but it complements T

Another useful tweak is to turn on the option that forces all popups into tabs rather than new windows. This is an option in FireFox itself but it complements TST quite nicely, because it means that the popup's tab appears underneath it's parent's tab in the tree. Popping up in a separate window with no tab at all is pretty much the opposite of that! This is a nice option to turn on anyway. IMO there is no reason why a webpage should ever be able to open another window on my computer. For me, this is the other killer feature in FireFox. This also stops pages being able to resize/move windows (because that only works in popup windows), which stops the worse aspect of "the annoying site" which came up recently on Hacker News. To change the setting: in about:config change browser.link.open_newwindow.restriction to 0. Source: https://support.mozilla.org/en-US/questions/1066799 https://support.mozilla.org/en-US/questions/1066799