What is "fpvstyle.com/media/favicon"

When I open Firefox v44. It is very slow to open, which I expect as I have many tabs set to restore with Session Manager. So the slowness is understandable. Eventually FF opens as well as a couple pop up windows with messages from Avast that advise of a virus found. It lists fpvstyle.com/media/favicon as the virus.

Is this truly a virus or a false positive? How do I determine what page is creating this message? I’d like to locate the source and close it for good, stopping the slow down and virus message.

I looked in the Avast settings and unable to locate log files for any more information.

submit the file to VirusTotal

I have no idea what that means. Please explain and I will be happy to do as directed.

https://www.virustotal.com/

also follow these instructions :
https://forum.avast.com/index.php?topic=53253.0