Welcome to Thunderbird Add-ons.

Add extra features and styles to make Thunderbird your own.

Close

On the go?

Check out our Mobile Add-ons site.

Close

Top-Rated Extensions

Subscribe

KDE Breeze Dark - Mountains

A theme to fit KDE Breeze Dark, with automatic color selection, and using the new Mountains wallpaper

Not yet rated
22 users

Download Now

Mail Delivery 4K (2004)

Mail Delivery 4K (2004) theme for Thunderbird 100+ and 4K monitors.

Not yet rated
27 users

Download Now

Mail Delivery 4K (2009)

Mail Delivery 4K (2009) theme for Thunderbird 100+ and 4K monitors.

Not yet rated
10 users

Download Now

Mail Delivery 4K (2009 Alt)

Mail Delivery 4K (2009 Alt) theme for Thunderbird 100+ and 4K monitors.

Not yet rated
20 users

Download Now

Mail Delivery 4K (Red)

Mail Delivery 4K (Red) theme for Thunderbird 100+ and 4K monitors.

Not yet rated
82 users

Download Now

Mail Delivery 4K (2018)

Mail Delivery 4K (2018) theme for Thunderbird 100+ and 4K monitors.

Not yet rated
30 users

Download Now

Mail Delivery 4K (2023)

Mail Delivery 4K (2023) theme for Thunderbird 100+ and 4K monitors.

Not yet rated
124 users

Download Now

Endeavour_Purple

My Theme

Not yet rated
4 users

Download Now

Everforest

Everforest theme for Thunderbird.

Not yet rated
49 users

Download Now

Blurple

Blurple: A calming blend of blue and purple.

Start blurpmaxxing today.

Not yet rated
7 users

Download Now