What you can do if you spot a fake update notice? To learn more about the "Heartbeat" feature, see the article Rate your Firefox experience, surveys and out of date messages (Heartbeat) and this Mozilla Wiki page. An update is required to stay secure and an Update Now button, this is a legitimate Firefox update notice and you should update Firefox. If you start Firefox and see a notification bar with a Heartbeat icon, the message Your Firefox is critically out of date. You can always manually check for Firefox updates - to learn how, see Update Firefox to the latest release. These are hosted on randomly generated and quickly changing domains:įirefox has an automated background update mechanism which will never prompt you to manually download and execute a file, except in the case of a Heartbeat notification (see below). This is an example of what a fake Firefox update notice might look like. Those fake notices get triggered by code contained in ads that are displayed on otherwise legitimate websites you are visiting and get spread through advertisement networks.
To our knowledge, fake update notices are a form of " malvertising". 3 What you can do to prevent malware on your computer.2 What you can do if you spot a fake update notice?.1 What is a fake Firefox update notice?.
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