Using the latest Firefox 64bit on Windows 10. At the company I work for firefox is not the default browser but IT-Administration tolerates the use, though does not give any support on occuring issues. Up to know this was fine, but recently more and more websites are not displayed in firefox since it tells some certificate is not up to date. While in Chrome and Edge browser those sites work. I found some mozilla support page telling some things IT administration could do about this, but since the other two browsers work I don't get help there. Leaves me in switching away from my favorite to use chrome in future. So I hope you can iprove this and maybe get me back. This problem is not only with some fancy websites but with such common ones as google or company internal pages. There seems to be no way to create an exception list or some workaround. So I'm forced to use another browser which is increasingly annoying.