Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Customization

Customize product appearance and functionality to suit your preferences.

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Customize Date and Time formats in Thunderbird

Message threading in Thunderbird - keep messages grouped by conversation

Close to tray starting in 154

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

Display the Thunderbird menus and toolbar

Add Search Engine to Open Search

How to Customize the New Mail Sound

Unified Toolbar

userChrome.css and .js and userContent are unsupported

Illustration of hands

தன்னார்வலர்

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