Prevents

Hide Private Mode for Firefox prevents private browsing mode detection

https://www.ghacks.net/2019/10/09/hide-private-mode-for-firefox-prevents-private-browsing-mode-detection/

a week ago

Hide Private Mode is a brand new extension for the Firefox web browser that closes a private browsing mode detection loophole that sites use to detect if the browser is in private […]

PrivateFirefoxPreventsBrowsingDetection