gBrowser.mTabContainer.addEventListener("click", function(event) {
    if(event.button == 0 || event.target.localName != "tab")
       return;

    if(event.button == 2)
    {
       if(event.ctrlKey) {
          return;
       }
       gBrowser.removeTab(event.target);
       event.preventDefault();
    }
    else
    {
       event.stopPropagation();
       let simulatedClick = document.createEvent("MouseEvents");
       simulatedClick.initMouseEvent("contextmenu", true, true, window, 1, event.screenX, event.screenY, event.clientX, event.clientY, false, false, false, false, 2, null);   // "contextmenu" is not "click", and there won't be a recursion.
       event.target.dispatchEvent(simulatedClick);
    }
}, true);