If you go to the Account Settings in thunderbird, click Manage Identities (this screenshot).. then you see a list of your identities tied to that account. When I click Edit for any of them, I see the blank window (attached in description).
If you go to the Account Settings in thunderbird, click Manage Identities (this screenshot).. then you see a list of your identities tied to that account. When I click Edit for any of them, I see the blank window (attached in description).