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Actually I ve got a .cer certificate that has to be installed on Mozilla browsers via GPO

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Actually I ve got a .cer certificate that has to be installed on all my domain computers. I ve created a GPO for that on my 2008 DC under: Computer configuration--policies--windows settings--security settings--public key policies and imported it on Trusted root certification authorities. it worked with Internet Explorer and Google Chrome. For mozilla i just followed this post https://4sysops.com/archives/group-policy-for-firefox-and-chrome/#comment-313021 Unfortunatelly it did't work. Am I missing something?

I would appreciate your time and help on this.

Actually I ve got a .cer certificate that has to be installed on all my domain computers. I ve created a GPO for that on my 2008 DC under: Computer configuration--policies--windows settings--security settings--public key policies and imported it on Trusted root certification authorities. it worked with Internet Explorer and Google Chrome. For mozilla i just followed this post https://4sysops.com/archives/group-policy-for-firefox-and-chrome/#comment-313021 Unfortunatelly it did't work. Am I missing something? I would appreciate your time and help on this.

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hello Gina8, firefox builds from mozilla don't come with any gpo support. if you need to deploy certificates for firefox on a larger scale please see https://mike.kaply.com/2015/02/10/installing-certificates-into-firefox/ and for changes in firefox 49 which might be of great help here: https://mike.kaply.com/2016/09/01/upcoming-changes-to-root-certificates-in-firefox-on-windows/