Hi, I've got a code signing certificate (.pfx) from GlobalSign and tried to sign my extension package. I used the ZXPSignCmd tool and got the following response: Unable to build a valid…
I did what Fraser said and it worked for me. Did you try this: http://www.multunus.com/blog/2010/02/convert-code-signing-certificates-from-pfx-to-p12-for mat/
