bbrowser-confirm-open-multiple-tabs-message",
        args: { tabCount: numTabsToOpen },
      },
      { id: "tabbrowser-confirm-open-multiple-tabs-button" },
      { id: "tabbrowser-confirm-open-multiple-tabs-checkbox" },
    ]);

    let buttonPressed = Services.prompt.confirmEx(
      aWindow,
      title.value,
      message.value,
      Services.prompt.BUTTON_TITLE_IS_STRING * Services.prompt.BUTTON_POS_0 +
        Services.prompt.BUTTON_TITLE_CANCEL * Services.prompt.BUTTON_POS_1,
      button.value,
      null,
      null,
      checkbox.value,
      warnOnOpen
    );

    let reallyOpen = buttonPressed == 0;
    // don't set the pref unless they press OK and it's false
    if (reallyOpen && !warnOnOpen.value) {
      Services.prefs.setBoolPref(WARN_ON_OPEN_PREF, false);
    }

    return reallyOpen;
  },

  /*
   * Async version of confirmOpenInTabs.
   */
  promiseConfirmOpenInTabs(numTabsToOpen, aWindow) {
    return new Promise(resolve => {
      Services.tm.dispatchToMainThread(() => {
        resolve(this.confirmOpenInTabs(numTabsToOpen, aWindow));
      });
    });
  },
};
PK