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Thunderbird Add-ons

Thunderbird add-ons based on WebExtensions technology, supporting extensions and themes.

Field note

What it does

Thunderbird add-ons are WebExtensions that modify Thunderbird's look and behavior. They use stable APIs, require user permissions, and can include custom APIs via Experiments.

Capabilities

Available capabilities

Extensions Permissions Themes WebExtension APIs Experiments

A Guide to Extensions

Thunderbird Add-ons

What it does

Available capabilities

Tags

Ways to use it

Product features

A Guide to Extensions

Background Page

CloudFile Management Scripts

Content Scripts

Defining one or more background scripts directly

Experiment APIs

Extension Icons

Options Page

Permissions

The manifest.json file

User Interface Elements

WebExtension Scripts