[arch-general] Weird program in $PATH

Hey everyone, today I tried to launch firefox from my awesome-wm launcher and instead of being offered firefox after typing fire, the prompt finished showing me alternatives and being a little lazy I just pushed enter. This gave me a window with some fire particle animations running on my screen. Searching for the program in my pacman.log did not show me anything so I'm wondering where this program comes from. Can anyone of you maybe help me to at least get this thing removed without having any files left that are only used by this program? Best regards, Heiko