Did you contact your bank to confirm that they send this email as it is always possible that this is a phishing attempt ? If you get a pop-up message asking to update Firefox or plugins or receive emails then such a message is likely or possiblt a scam and you should NEVER respond to avoid getting infected with malware. *only update Firefox via "Help -> About" or by downloading and installing Firefox from the Mozilla and never via a pop-up or link on a web page. See also: *https://support.mozilla.org/en-US/kb/kb/i-found-fake-firefox-update *https://support.mozilla.org/en-US/kb/avoid-and-report-mozilla-tech-support-scams