Firefox Open popups in new tabs

By default, all popups are opened in a new window. To open popups in new tabs, go to about:config and change the browser.link.open_newwindow.restriction to any of the following values:

1. 0: Divert all new windows to current tab/window or new tab.
2. 1: Don’t divert any windows spawned by JS
3. 2(Default): Don’t divert JS windows that include size/placement/toolbar info