Add-ons
Top-Rated Extensions
Sort by:
KDE Breeze Dark - Mountains
A theme to fit KDE Breeze Dark, with automatic color selection, and using the new Mountains wallpaper
Mail Delivery 4K (2004)
Mail Delivery 4K (2004) theme for Thunderbird 100+ and 4K monitors.
Mail Delivery 4K (2009)
Mail Delivery 4K (2009) theme for Thunderbird 100+ and 4K monitors.
Mail Delivery 4K (2009 Alt)
Mail Delivery 4K (2009 Alt) theme for Thunderbird 100+ and 4K monitors.
Mail Delivery 4K (2018)
Mail Delivery 4K (2018) theme for Thunderbird 100+ and 4K monitors.
Mail Delivery 4K (2023)
Mail Delivery 4K (2023) theme for Thunderbird 100+ and 4K monitors.
New Year's Eve Theme
Celebrate New Year's Eve with this festive Thunderbird theme featuring fireworks and sparkling visuals.
MintGreen Dark Soft
This theme matches well with LinuxMint and Cinnamon Theme.
Use an add-on like Darko to darken the message body.
Originally written for Firefox.
Thanks to calvinchd at calch.themes.thunderbird.net for original Gruvbox Dark.
Tested up to v128.
To create your own collections, you must have a Mozilla Add-ons account.
