Firefox works fine from my home network or while I connect to internet directly via data card. However @ my office we use proxy and for almost all the sites (even google search) Firefox stops me stating "This Connection is Untrusted". Attached are the screenshot for the same to help to help me. I search quite a lot and closest I came was at this url https://support.mozilla.org/en-US/questions/978722 Is there a way in Firefox to add this office proxy certificate in the certificate chain (not sure if that Will that help??) How do I solve this? Kindly advice.