Do you have this running on your pc? I don't use firefox anymore and my father is worried his pc is infected. He's worried about the firefoxrrr.exe
Nope. no rrr.exe here either. Why dont you rename the firefoxrrr.exe file and see what happen? BTW, you didn't have firefox.exe running on your pc either.
FirefoxRRR? It's probably a... prrrrrrrr... [pretends to air-drumroll]... prrrrrrr.... [catches breath] prrrrrrrr..r.rr.rr.rrrr... A PIRATE program!
Tell him to update to the newest Firefox. If the rrr file is still there delete it or download a scanner like Avira or Avast