MDN’s new design is in Beta! A sneak peek: https://blog.mozilla.org/opendesign/mdns-new-design-beta/

Create Custom Column

The article "Creating a Custom Column" will get you well on the road to creating your own columns and populating them with custom data. The customDBHeaders Preference article provides information on a preference setting that exposes custom header data for use in a custom column within Thunderbird's main view.

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 Contributors to this page: wbamberg, jllogan
 Last updated by: wbamberg,