Tell HN: Moltbook was running in my browser

Hey HN, I have never downloaded moltbook, yet it was being ran by FireFox. I'm slightly confused by this, since I have never used moltboook.

Does anyone know if one of the following tools integrated this? - GitLab (unlikely) - Google Docs - Asana

Or one of these plug-ins - ColorZilla - 1Password - Wappalyzer

The moment I closed my FireFox the process was gone.