Package: thunderbird Version: 1:78.7.1-1 In Thunderbird, i went to Preferences » Privacy and Security » Manage Certificates » Authorities and selected "COMODO RSA Certification Authority".
Then i clicked "View". in the viewer, there are different attributes of
the X.509 certificate. Two of those attributes ("Basic Constraints" and
"Key Usages") have an empty square box to the left of the attribute name
(see attached picture).
If I use the mouse to select those label regions, and then copy/paste
into some other tool, they show:
[This extension has been marked as critical, meaning that clients must reject
the certificate if they do not understand it.] Basic Constraints
and:
[This extension has been marked as critical, meaning that clients must reject
the certificate if they do not understand it.] Key Usages
So i think that empty square box is supposed to indicate that the
extension is a "critical" extension. (and the copy/paste is grabbing
something equivalent to HTML alt-text).
Problems with this situation:
- the empty square box doesn't communicate criticality -- presumably
this is an image resource that is failing to render properly.
- if this is actually just an image resource that is missing or fails
to render, then the alt text should show in its place, right? but it
doesn't; it just shows the blank image.
Thanks for maintaining Thunderbird in Debian!
--dkg
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