Enter ''about:config'' in the address bar, accept the risk and search for ''browser.link''. Change the value of this preference to 1 : ''browser.link.open_newwindow'' That will result in all links (except JavaScript links) opening (with a left click) in the current tab. Is that what you want? ---- If you also want JS links to open in the current tab, you need to change the value of the following preference to 1 : ''browser.link.open_newwindow.restriction'' https://support.mozilla.org/en-US/kb/about-config-editor-firefox