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Add-ons, extensions, and themes

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Add-ons, extensions, and themes

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

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Filelink for Large Attachments

Permission request messages for Thunderbird extensions

Thunderbird add-ons - frequently asked questions

Install themes to change the look of Thunderbird

Installing an Add-on in Thunderbird

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

How to Customize Toolbars

Certificates

Add-Ons FAQ

How can I digitally sign and encrypt emails?

Installing and Using another Language in the Dictionary

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

Unable to uninstall add-ons (extensions or themes)

Install the Thunderbird Pro Add-on in Thunderbird Desktop

Support for add-ons using Experiment APIs in Thunderbird

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