There is a change in Firefox 96 related to cookies and insecure sites. *https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/96#http See also: *[/questions/1363998] blocked 3rd party cookies As a workaround for now you can modify this pref on the about:config page to revert this change. *about:config => network.cookie.sameSite.laxByDefault = false You can open the <b>about:config</b> page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue. *https://support.mozilla.org/en-US/kb/about-config-editor-firefox See also: *https://support.mozilla.org/en-US/kb/cookies-information-websites-store-on-your-computer