While you are viewing it from a site, the entire cert is in the address bar. You can copy that, or bookmark it. You can copy text from the displayed cert one line at a time.

If you are looking at the certs in the browser Preferences, you could do the same, or export them to .crt files.

See also the Security tab in the Network Monitor for connection details.

• https://developer.mozilla.org/en-US/Tools/Network_Monitor

I am looking at a simplier display of the certificate information.

If I display the certificate I can only select the first part of the cert but not the entire certificate information.

Example Common Name support.mozilla.org

There is alot more information but trying select all or selecting with a mouse doesn't work.

Maybe this extension:

• https://addons.mozilla.org/firefox/addon/certainly-something/

That extension certainly allows copying all text at once. Odd coincidence, I just read an article by April King.