How to disable Firefox: “Warning: Potential Security Risk Ahead” forever

If you are developing websites with local signed SSL certificates, each time you change the port, Firefox shows the below alert:

You can accept the risk and go on… But I hate to do this every time my port number changes. I tried several configs to turn this thing to completely off. Here’s how I achieved this.

Turn off / Disable Firefox “Warning: Potential Security Risk Ahead”

1. Type about:config in the address bar and press Enter.
   A warning page may appear. Click Accept the Risk and Continue.
2. Change the following settings:

security.insecure_field_warning.contextual.enabled = false
security.certerrors.permanentOverride = false
network.stricttransportsecurity.preloadlist = false
security.enterprise_roots.enabled = true

3. Restart the Firefox to apply changes.

You’ll not see that warning anymore!

Happy coding ;)