Hi Aj Vignesh,
I assume you are using certificates generated by using certutil script. By default, these are the self-signed certificate, auto-generated CA certificates. This is the reason for the error in the browser. By default browser do not trust these.
In production environments, you would use a certificate which is signed by a public trusted CAs like Symantec, Verisign, Thwate etc. or you could install the CA certificate in the browser that you trust.
certutil allows you to generate csr (certificate signing request) and then you can get the signed certificate from above mentioned trusted CAs.
Refer for more info:
~
Yogesh