Why "Delete" button in "Certificate manager" is disables? Why certificates are prefilled?

[J.R. Oldroyd]

On Fri, 04 Jan 2013 23:38:07 -0800 Yuri <yuri at rawbw.com> wrote:

> On 01/04/2013 19:13, J.R. Oldroyd wrote:
> > For certificates that were distributed with the browser, you can
> > click the "Edit" button and disable the three Trust boxes which
> > essentially turns off the certificate.
> 
> For the matter of testing, I disabled all Thawte* certificates.
> And https://google.com still shows without a problem and says that
> its identity is verified by Thawte SGC CA.
> 
> Yuri

The certificate hierarchy for the google.com certificate shows that it
is signed by the two "Verisign Class 3 Public Primary Certification
Authority" certificates.

If you uncheck the box for "Trust for verifying web sites" for these
two certificates, then reload the https://google.com page, the browser
is no longer able to verify the certificate.

	-jr