Thunderbird icon also getting an update

Following recent Firefox update, Mozilla announced its plans to make a slight update to the Thunderbird icon for the upcoming Thunderbird 3 release, currently in Beta 2 status.

As detailed in the creative brief, the update would keep the general layout and palette, could add an @ to the envelope, make the icon more 3D with more layers wrapping the envelope, make the icon more round, and extend the head feathers to the back.