Normandy is the name of Mozilla’s system to run A/B experiments in Firefox. You can check if you are or have been enrolled in any experiments by entering about:

Normandy is the name of Mozilla’s system to run A/B experiments in Firefox. You can check if you are or have been enrolled in any experiments by entering about:studies in your Firefox address bar. Here are instructions for opting out of experiments: https://support.mozilla.org/en-US/kb/shield https://support.mozilla.org/en-US/kb/shield https://support.mozilla.org/en-US/kb/how-opt-out-studies-firefox-android https://support.mozilla.org/en-US/kb/how-opt-out-studies-fir...