Uh, you should really update Firefox. Like, right now.

It turns out that hackers love Firefox, too.

The non-profit Mozilla Foundation, which makes the popular browser, issued a security bulletin Wednesday warning of a serious vulnerability in Firefox that allows bad actors to install software on unsuspecting victims' computers.

Which means, of course, that you should update your Firefox browser.

Like, immediately.

Especially because, as Mozilla notes, hackers are actively exploiting this vulnerability. "We are aware of targeted attacks in the wild abusing this flaw," warns the foundation.

The vulnerability, labeled as "critical" by Mozilla, "can be used to run attacker code and install software, requiring no user interaction beyond normal browsing."

In other words, no shady links or sketchy downloads required. Just going about your normal online business is all you need to do to be vulnerable. It's such a serious problem that even the Department of Homeland Security's Cybersecurity and Infrastructure Security Agency is warning people about it.

Thankfully, there's a fix. All you have to do is update to the latest version of Firefox, and you're set. To do so, when the browser is open, click "Firefox," then "about Firefox," and the update option.

If you see "Firefox is up to date," then you're already good.

There, wasn't that easy? You can now rest easy knowing that this vulnerability, at least, won't be your digital downfall.