add_task(async function test() {
  let tab1 = await addTab("http://example.com/1");
  let tab2 = await addTab("http://example.com/2");
  let tab3 = await addTab("http://example.com/3");

  await BrowserTestUtils.switchTab(gBrowser, tab1);
  await triggerClickOn(tab2, { ctrlKey: true });

  ok(tab1.multiselected, "Tab1 is multi-selected");
  ok(tab2.multiselected, "Tab2 is multi-selected");
  ok(!tab3.multiselected, "Tab3 is not multi-selected");

  let metaKeyEvent =
    AppConstants.platform == "macosx" ? { metaKey: true } : { ctrlKey: true };

  let newTabButton = gBrowser.tabContainer.newTabButton;
  let promiseTabOpened = BrowserTestUtils.waitForEvent(
    gBrowser.tabContainer,
    "TabOpen"
  );
  EventUtils.synthesizeMouseAtCenter(newTabButton, metaKeyEvent);
  let openEvent = await promiseTabOpened;
  let newTab = openEvent.target;

  is(
    newTab.previousElementSibling,
    tab2,
    "New tab should be opened after tab2 when tab1 and tab2 are multiselected"
  );
  is(
    newTab.nextElementSibling,
    tab3,
    "New tab should be opened before tab3 when tab1 and tab2 are multiselected"
  );
  BrowserTestUtils.removeTab(newTab);

  await BrowserTestUtils.switchTab(gBrowser, tab1);
  ok(!tab1.multiselected, "Tab1 is not multi-selected");
  ok(!tab2.multiselected, "Tab2 is not multi-selected");
  ok(!tab3.multiselected, "Tab3 is not multi-selected");

  promiseTabOpened = BrowserTestUtils.waitForEvent(
    gBrowser.tabContainer,
    "TabOpen"
  );
  EventUtils.synthesizeMouseAtCenter(newTabButton, metaKeyEvent);
  openEvent = await promiseTabOpened;
  newTab = openEvent.target;
  is(
    newTab.previousElementSibling,
    tab1,
    "New tab should be opened after tab1 when only tab1 is selected"
  );
  is(
    newTab.nextElementSibling,
    tab2,
    "New tab should be opened before tab2 when only tab1 is selected"
  );
  BrowserTestUtils.removeTab(newTab);

  await BrowserTestUtils.switchTab(gBrowser, tab1);
  await triggerClickOn(tab3, { ctrlKey: true });
  ok(tab1.multiselected, "Tab1 is multi-selected");
  ok(!tab2.multiselected, "Tab2 is not multi-selected");
  ok(tab3.multiselected, "Tab3 is multi-selected");

  promiseTabOpened = BrowserTestUtils.waitForEvent(
    gBrowser.tabContainer,
    "TabOpen"
  );
  EventUtils.synthesizeMouseAtCenter(newTabButton, metaKeyEvent);
  openEvent = await promiseTabOpened;
  newTab = openEvent.target;
  let previous = gBrowser.tabContainer.findNextTab(newTab, { direction: -1 });
  is(
    previous,
    tab3,
    "New tab should be opened after tab3 when tab1 and tab3 are selected"
  );
  let next = gBrowser.tabContainer.findNextTab(newTab, { direction: 1 });
  is(
    next,
    null,
    "New tab should be opened at the end of the tabstrip when tab1 and tab3 are selected"
  );
  BrowserTestUtils.removeTab(newTab);

  await BrowserTestUtils.switchTab(gBrowser, tab1);
  ok(!tab1.multiselected, "Tab1 is not multi-selected");
  ok(!tab2.multiselected, "Tab2 is not multi-selected");
  ok(!tab3.multiselected, "Tab3 is not multi-selected");

  promiseTabOpened = BrowserTestUtils.waitForEvent(
    gBrowser.tabContainer,
    "TabOpen"
  );
  EventUtils.synthesizeMouseAtCenter(newTabButton, {});
  openEvent = await promiseTabOpened;
  newTab = openEvent.target;
  previous = gBrowser.tabContainer.findNextTab(newTab, { direction: -1 });
  is(
    previous,
    tab3,
    "New tab should be opened after tab3 when ctrlKey is not used without multiselection"
  );
  next = gBrowser.tabContainer.findNextTab(newTab, { direction: 1 });
  is(
    next,
    null,
    "New tab should be opened at the end of the tabstrip when ctrlKey is not used without multiselection"
  );
  BrowserTestUtils.removeTab(newTab);

  await BrowserTestUtils.switchTab(gBrowser, tab1);
  await triggerClickOn(tab2, { ctrlKey: true });
  ok(tab1.multiselected, "Tab1 is multi-selected");
  ok(tab2.multiselected, "Tab2 is multi-selected");
  ok(!tab3.multiselected, "Tab3 is not multi-selected");

  promiseTabOpened = BrowserTestUtils.waitForEvent(
    gBrowser.tabContainer,
    "TabOpen"
  );
  EventUtils.synthesizeMouseAtCenter(newTabButton, {});
  openEvent = await promiseTabOpened;
  newTab = openEvent.target;
  previous = gBrowser.tabContainer.findNextTab(newTab, { direction: -1 });
  is(
    previous,
    tab3,
    "New tab should be opened after tab3 when ctrlKey is not used with multiselection"
  );
  next = gBrowser.tabContainer.findNextTab(newTab, { direction: 1 });
  is(
    next,
    null,
    "New tab should be opened at the end of the tabstrip when ctrlKey is not used with multiselection"
  );
  BrowserTestUtils.removeTab(newTab);

  BrowserTestUtils.removeTab(tab1);
  BrowserTestUtils.removeTab(tab2);
  BrowserTestUtils.removeTab(tab3);
});