Settings

Add-ons, extensions, and themes

Enhance product functionality with add-ons, extensions, and themes.

Filelink for Large Attachments

Messages with large attachments are often rejected by mail servers. Thunderbird can use web-based storage services to send large file attachments.

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Installing an Add-on in Thunderbird

Add-ons add functionality to Thunderbird or change its appearance. Learn how to install add-ons to Thunderbird.

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How to Customize Toolbars

This article explains how to customize the position and contents of Thunderbird toolbars.

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Unified Toolbar

Intro to the Unified Toolbar and how to customize the buttons for the different toolbars for: Mail, Address Book, Calendar, Tasks, Chat and Settings "Spaces."

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Open Search

Instantly take part of a message and search for it in Bing, Yahoo, Twitter or other websites.

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Add Search Engine to Open Search

Open Search enables Thunderbird users to search various websites from within Thunderbird. This article describes how to add additional websites to the Open Search interface.

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