In one of my Firefox installs, the Profiler automatically starts recording every time I open Firefox. There's a button on the right that looks like a speedometer and it is blue until I tell it to stop. Then it is taskbar button color. Profiler instructions at '''https://profiler.firefox.com/docs/#/./guide-removing-profiler''' say to simply drag this button off the toolbar and it will stop record. On restart, it's back on the toolbar, and it's recording. I have tried refreshing Firefox. Doesn't help. I have tried uninstalling and reinstalling Firefox, and then setting up a new profile. Doesn't help. I have tried deleting prefs.js. Doesn't help. I have tried opening up the developer console, opening settings, and unchecking "performance." Doesn't help. I searched the registry and found a key called MOZ_ENABLE_PROFILER (iirc, something like that). I set it to zero. Doesn't help. I then deleted the key entirely. Doesn't help. How do I get rid of this thing? It must be a registry setting of some kind, as it appears in whatever Windows account I open Firefox from, but I can't find it. It is deeply frustrating as the computer it is happening on is my oldest computer, and I don't want a recorder running in addition to Firefox.