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Add-ons, extensions, and themes

Settings

Add-ons, extensions, and themes

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

In English

Filelink for Large Attachments

Permission request messages for Thunderbird extensions

Installing an Add-on in Thunderbird

How to Customize the New Mail Sound

Thunderbird add-ons - frequently asked questions

Install themes to change the look of Thunderbird

Unified Toolbar

Certificates

How to Install and Use another Language in the Dictionary on Thunderbird

Add-Ons FAQ

Open Search

Add Search Engine to Open Search

How can I digitally sign and encrypt emails?

Installing and Using another Language in the Dictionary

How to Customize Toolbars

Unable to install add-ons (extensions or themes) in Thunderbird

Unable to uninstall add-ons (extensions or themes)

userChrome.css and .js and userContent are unsupported

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