[vwuon]

Seems like these scripts are triggered by malvertising -- if your ad blocker is properly configured this should never happen.

[chefandy]

People with enough internet smarts to have an ad blocker aren't the target demographic for the ol' "your computer are hackered u are ded without u give us muney" JS dialog.

[vwuon]

I was under the impression that Firefox already shipped with an ad blocker by default?

[chefandy]

The default ad-blocking functionality won't block an attack like this. You'd need a more robust blocker like NoScript.

[chefandy]

(which is great if you're looking for one, BTW!)