Add-ons
Top-Rated Extensions
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Rose Pine Dawn
A theme based on the Rose Pine Dawn color scheme (https://rosepinetheme.com/)
summersmile
Summersmile adds a lively flair to Thunderbird with a sunny yellow background, playful smiley graphics, and a "sunshine and smiles" theme that refreshes your email experience.
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.
Classic BB Colors
Calm and simple, bright theme in classic blue and beige colors.
Screenshots: https://imgur.com/AWjqqfe | https://imgur.com/75u8TvJ
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.
Vioorange Warm
Warm, cozy, bright theme in violet and orange, ideal for winter or autumn.
Screenshots: https://imgur.com/NdKQA43 | https://imgur.com/uXtZpPw
Pistachio Ocean
Light and fresh, calming theme in pistachio and bright blue colors - not only for medics.
Screenshots: https://imgur.com/0hNFPjY | https://imgur.com/0Rma4Mn
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