Firefox Private Browsing Mode will remove path information from referrers sent to third parties starting in Firefox 59. The new site you visit receives the exact address of the site you came from through the so-called Referrer value This leaks user data to websites, telling websites the exact page you were looking at when you clicked the link. To prevent this type of data leakage when Firefox users are browsing privately, we are changing the way Firefox sends referrers in private. This change prevents site authors from accidentally leaking user data.”]