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Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

Settings

Customization

Customize product appearance and functionality to suit your preferences.

In English

Appearance Panel - Layout, Message List, Card View, Table View, Sorting and Threading settings

Customize Date and Time formats in Thunderbird

Message threading in Thunderbird - keep messages grouped by conversation

Display the Thunderbird menus and toolbar

Unified Toolbar

How to Customize the New Mail Sound

userChrome.css and .js and userContent are unsupported

Add Search Engine to Open Search

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