MailCheck is not displayed in Firefox

If mail.com MailCheck is not visible or you accidentally hid it, you can show the extension again with a few clicks.

Cause

You accidentally hid or deactivated MailCheck.

Showing MailCheck

  1. Right-click a button on the toolbar.
  2. Click on mail.com MailCheck.

    Showing/hiding MailCheck

Enabling MailCheck

  1. Click the menu button and then Add-ons.

    Opening add-ons

  2. Select the Extensions category.
  3. Select the mail.com MailCheck entry and click Enable.
  4. Restart Firefox.