Enhanced Tracking Protection shield button is gone

[Maxim Cournoyer]

Hello,

I've noticed for some time already that the blue shield button [0] that used
to be present on the left of the URL bar has vanished in recent versions
of IceCat.  That button could be used to whitelist a particular site and
disable the builtin tracking protection features of IceCat.

Is there a reason for its omission, or is it a bug?  There doesn't seem
to be a way to whitelist a website from it anymore.

Thank you,

Maxim

[0]
https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop#firefox:linux:fx78