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Hasiera
Thunderbird
Settings
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

Thunderbird add-ons - frequently asked questions

Install themes to change the look of Thunderbird

Open Search

Installing an Add-on in Thunderbird

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

Unable to uninstall add-ons (extensions or themes)

Certificates

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

Add-Ons FAQ

Add Search Engine to Open Search

How can I digitally sign and encrypt emails?

How to Customize the New Mail Sound

Installing and Using another Language in the Dictionary

How to Customize Toolbars

Unified Toolbar

userChrome.css and .js and userContent are unsupported

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