Thank you for your feedback.

Please note that the MailCheck add-on does not steal any data.

You are also welcome to read our general privacy policy:

https://www.mail.com/company/privacypolicy/

Unfortunately, we cannot reproduce the issue mentioned above.

The last open tab is the mail.com search engine.

This is optional and can easily be turned on or off.

To change the setting for the MailCheck, perform the following steps:

1. Right-click on the MailCheck (envelope symbol) in the upper right corner.

2. Click on the entry "MailCheck Options" and go to „Search“.

3. Remove the check mark at "Closeing last tab opens web search".

4. Close the MailCheck dialog box.

5. Right-click on the last tab and select "Unpin tab".

6. Close the last tab with the "cross symbol".
Now the mail.com search will not be opened when closing the last tab.

If you do not want to use MailCheck any more, you can uninstall the extension with a few clicks:

1. Click the menu symbol of your browser.
2. Select Add-ons.
3. Select the mail.com MailCheck entry and click Remove.

mail.com MailCheck is removed from Firefox.

If you have further questions about MailCheck, we will be happy to help you at mozdev@1und1.de.

Best regards,

Your MailCheck-Team