Wolkom by Thunderbird Add-ons.
Foegje ekstra funksjes en stilen ta om Thunderbird hielendal fan jo te meitsjen.
SluteOer dizze add-on
The maximum Thunderbird version the add-on works with is now 153.0.
A replacement theme is currently available at https://addons.phoenity.nl/themes.html and
https://addons.thunderbird.net/en-US/thunderbird/addon/phoenity-shredder-icons/
This is a (limited) replacement for the Phoenity Shredder theme.
Full themes are no longer supported on Thunderbird 68 and higher.
On Compose and separate Message windows the icon size (small icons) can be set in the "Customize Toolbar" dialogs.