mail.com MailCheck will be updated automatically at periodic intervals. If you want to, you can also update MailCheck manually.
Using an outdated version of mail.com MailCheck could cause errors in the extension. Generally, MailCheck automatically updates itself. In some cases however, you may have to update MailCheck manually.
Open the Settings dialog.
If you are in minimized mode, click the letter icon on the toolbar and then the gear icon.
If you are in maximized mode, click the wrench icon on the toolbar.
This will open the Settings dialog.
Select the Basic tab.
Click the Check for Updates button.
If you are notified that a new version is available, click the OK button.
You have the following options:
If you have important content open, click the Wait button. Close the important content and restart Firefox.
If you do not have any important content open, click the Restart now button.
Firefox will be restarted and MailCheck will update to the latest version.