It is a so called PUA (Potentially Unwanted Application). The file can safely be removed from your system. It is an extension in your browser. If you want to keep the file(s) it is fine as well.
HitmanPro Tech Support
and the answer of Avast support:
"Hello Mr. ..........,
I thank you for your patience.
I confirm that this is a false positive and that the detected file "messages.json" is a simple text file containing information on the name of Avast Online Security in different languages.
Thank you again for your patience.
I remain at your disposal for any further information and I wish you a good day, Mr ..............
Avast Customer Care"
Well this is very interesting. After a day, two days' maximum, you would expect a legit or new file to be whitelisted. After a week, things seem doubtful. I side with HitmanPro, especially since you can easily substitute Avast for other extensions.
Definitely a smack in the face for Avast, right? It's not so much the product itself but an uphill battle for user trust, it seems.
Avast is collecting its users’ browsing histories and selling the data to third parties, according to a joint investigation by PCMag and Motherboard. This is just the latest example of free antivirus software harvesting data. After all, that free antivirus has to make money somehow.
But at this point send this suspected files to Eastern AV companies (Dr.Web or Kaspersky) if they confirmed this file is safe its Fps
but personally I see this Fps from HMP it dose not too important...
simply removed this Spy tool and change it with better one.