Why does Firefox use an unsigned server connection request before conneting to internet?

<pre><i>Locking duplicate thread.
Please continue here: [[/questions/979016]]
</i></pre>
When an application wants to make a connection to a server for internet or updates it presents a signed server connection request. Recently, in order to get Firefox to connect to the internet, I have to approve unsigned server connection requests even though I know unsigned requests are open to abuse from hackers. How can I get Firefox and other applications from reliable suppliers to issue SIGNED server connection request? Please help. Regards.

See https://developer.mozilla.org/en-US/docs/Security/HTTP_Strict_Transport_Security

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