Hi I recommend you ask you question at [https://forums.mozfr.org/ https://forums.mozfr.org/ ].

pourrait on aider a pour Firefox il a pas de cadenas impossible de connecter et j ai besoin mon email pour travail

Bonjour Is this about accessing Microsoft Outlook (Hotmail)? ---- If you get the SEC_ERROR_OCSP_INVALID_SIGNING_CERT error message then this is a problem with Microsoft servers that are sending a cached OCSP Staplingresponse that is signed with an expired certificate. *https://portal.office.com/servicestatus Microsoft needs to reboot/repair the servers that have cached this expired certificate that is used to sign the OCSP Stapling response. You should no longer experience this issue once the server that you access has been fixed. Hopefully they will fix this quickly on affected servers. <hr> As a workaround you can temporarily toggle this pref to <b>false</b> on the <b>about:config</b> page to see if disabling OCSP Stapling works for you. *security.ssl.enable_ocsp_stapling = false You can open the <b>about:config</b> page: via the location/address bar. You can accept the warning and click "I'll be careful" to continue. *http://kb.mozillazine.org/about:config It is best to reset this pref via the right-click context menu to <b>true</b> once you are done with accessing an affected website since this is a security feature. See also: *https://en.wikipedia.org/wiki/OCSP_Stapling *https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/