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PSA: Homeland Security says to update Firefox now

Like, right now.

mozilla firefox logo on blue background
Image: Mozilla

Listen up Mac users (yes, that means you Kev). If you’re using Mozilla’s Firefox as your web browser, go update it, like right now.

To do that, go to the top-right menu and then Help > About > Update. Come back once you’ve done that and we’ll tell you the why.

If you use Mozilla’s Firefox, go update your shit

Mozilla has just fixed a zero-day in both Firefox and Firefox ESR that seems serious, as even the Department of Homeland Security has issued an advisory note about it. While we don’t know exactly what malicious actions someone exploiting it could do, patching security holes on your computer is always the right thing to do. The bug only affects Firefox and Firefox ESR users on macOS, so if that’s you, go update.

  • The advisory on the security exploit came from the Department of Homeland Security’s cyber protection division, CISA
  • Mozilla says it isn’t just a theoretical risk – they have seen it in action “We are aware of targeted attacks in the wild abusing this flaw.”
  • Other recent zero-day exploits in Firefox were targeting cryptocurrency holders

Firefox for iOS is unaffected, as it’s really a reskinned version of Safari. Windows users of Firefox are unaffected (as far as we know), but it never hurts to check for updates regularly and keep your software current.

What do you think? Surprised that Firefox has a security flaw like this? Let us know down below in the comments or carry the discussion over to our Twitter or Facebook.

Editors’ Recommendations for CES 2020:

Maker, meme-r and unabashed geek. Hardware guy here at KnowTechie, if it runs on electricity (or even if it doesn't) I probably have one around here somewhere. My hobbies include photography, animation and hoarding Reddit gold.

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