SSL certificate checker plugin for Firefox?

[Udo van den Heuvel]

Matej Kovacic wrote:
> Hi,
> 
>> 'petname tool'
>>
>> https://addons.mozilla.org/en-US/firefox/addon/957
> 
> No, it is not what I am looking for. And BTW, it is not working on this
> site: https://slo-tech.com

It does work.
It shows `Unknown site` until you enter your own naming for it.
Then it saves the current certs under that name.
So each time you re-visit the stuff is compared and when OK the status 
is green and your name are displayed.
When a change is detected.... stuff is different.