Firefox-patch.js

Hello Michael,
We are sorry to know that.  If you have the 2017 version of AVG. Please run a Whole Computer scan from AVG and see if the downloaded file is being detected.
Thank you.

I downloaded what appeared to be an authentic Mozilla Firefox urgent patch: firefox-patch.js  which I now discovered is a malware/virus.
 
How do I use my AVG Ultimate to detect and remove this PUP?

Hello Michael,
We are sorry to know that.  If you have the 2017 version of AVG. Please run a Whole Computer scan from AVG and see if the downloaded file is being detected.
Thank you.