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All users of Mozilla Firefox web browser need to update it immediately
The Department of Homeland Security warns that desktop (and laptop) versions of the Firefox web browser are under active, targeted attacks that allow hackers to take control of an entire operating system - whether it is Windows or Mac.
To upgrade your Firefox browser:
- On a Mac: launch Firefox and click About > Firefox
- Click the "Restart to update Firefox" button
- On a PC: launch Firefox and go under Options > Firefox Updates or Options > Advanced > Update
To be protected from this vulnerability, you want to be running Firefox 72.0.1 and Firefox ESR 68.4.1 or higher. Firefox browsers on mobile devices are not known to be affected.