Hi, how about have middle button do scrolling : https://addons.mozilla.org/firefox/addon/middle-mouse-button-scroll/

''deloren.lockett [[#question-1228287|said]]'' <blockquote> I don't want clicking the middle button on a tab header to close that tab. I want it to do nothing. How do I change this? </blockquote> I'm not aware of a way to disable that action on the tab bar (there are some settings related to what the mouse wheel / middle button does in web pages). Maybe someone else is aware of a trick for it. {Not a Solution} You probably know you can re-open the last closed tab using either: * Ctrl+Shift+t * right-click a different tab > Undo Close Tab If the problem with those is that the entire window is closing (there's only one tab), you can set Firefox to show a new tab when you close the last tab in a window: (1) In a new tab, type or paste '''about:config''' in the address bar and press Enter/Return. Click the button promising to be careful or accepting the risk. (2) In the search box above the list, type or paste '''tabs''' and pause while the list is filtered (3) Double-click the '''browser.tabs.closeWindowWithLastTab''' preference to switch the value from true to false