Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.Close
About this Add-on
This add-on listing is only for users of older versions of Thunderbird; if you have Thunderbird 24.0 or higher, you can already set the attachment pane to be expanded by default: just right-click on the attachment toolbar and check "Initially Show Attachment Pane".
For more information, please see the BitBucket repository.