I woke up this morning and this is what greeted me:



A while back, Microsoft released the ".NET Framework Assistant" as a Firefox add-on. Today, Firefox blocked it to disable a security vulnerability that affects it. So if this happens to your Firefox browser, don't fret, it's just a security tweak.

Mozilla noted this update in their Security blog.


Response post by — Christine

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Updated to add: The Mozilla Security blog has new information: "Microsoft has now confirmed that the Framework Assistant add-on is not a vector for this attack, and we have removed the entry from the blocklist."