Click "Manage Exceptions..." under Privacy and Security
Paste the Certificate Watch storage page into Address of Website (moz-extension://25b9c171-c26f-4a6c-8de1-8fd56be0f588/cw_storage.html)
Click Allow
You should see your Certificate Watch storage exception "moz-extension://25b9c171-c26f-4a6c-8de1-8fd56be0f588" next to "Allow" and it will persist through browser restarts.
This will let you clear other pesky web storage pages, but keep your certificate storage!
:fleur_de_lis: Want to keep certificate information even when :ballot_box_with_check:"Delete ALL cookies and ALL site data when Firefox is :x:ed"?
:gear: There is an easy way you can do this:
This will let you clear other pesky web storage pages, but keep your certificate storage!