SSL certificate checker plugin for Firefox?

[idefix at riseup.net]

Hi!

Quoting "Matej Kovacic" <matej.kovacic at owca.info>:
> My question is - is there a plugin for Firefox, which saves info about
> certificate of a website. When user comes back next time, plugin should
> check prevous certificate and the new one. If there is change, it should
> raise alarm.

I am not 100% sure if this is what you are searching for, but maybe  
you may have a look at "Perspectives". You will find informations on [1]

Greetingx!

[1] http://www.cs.cmu.edu/~perspectives/