If you are using the Firefox browser, you should probably update it as soon as possible.
Homeland Security has urged users to install the update because of a huge vulnerability.
A cyber-attacker could take control of your entire desktop. It doesn’t matter if you use a Windows or Mac system.
Firefox for mobile devices might not be affected by the security flaw.
Source: https://www.fastcompany.com/90450626/firefox-attacks-homeland-security-urges-mac-users-to-update-browsers-immediately-in-rare-warning