wget ERROR: cannot verify localhost's certificate, ..Self-signed certificate encountered

How Can I implement a secure https connection on ngnix

I want to implement https on my localhost.I am running http server nginx on ubuntu 20.04

What I did was i issued the command

sudo openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout /etc/ssl/private/localhost.key -out /etc/ssl/certs/localhost.crt -config /tmp/openssl

Then I configured nginx to use ssl as

 listen 443 ssl default_server; listen [::]:443 ssl default_server; ssl_certificate /etc/ssl/certs/localhost.crt; ssl_certificate_key /etc/ssl/private/localhost.key;

And Refreshed and reloaded nginix ...ok fine

certutil -d sql:$HOME/.pki/nssdb -A -t "P,," -n localhost.crt -i /etc/ssl/certs/localhost.crt

. .Every thing went fine

The tutorial i followed was from here

But when i tried to connect to

I got as

Then I clicked Advance and proceeded ..Then I got a MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT Error in Firefox

But when opening in chrome the error is

when i tried on wget

When I tried on postman

Please help me on how to get a secure self signed trusted https connection on localost

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