Add-ons This category is for discussing Thunderbird add-ons/extensions. This is a good place to discuss add-on development, ask questions about creating add-ons, and help others create new extensions.
Beta This category is used to describe and discuss Thunderbird Beta releases. Please only use this category to discuss Beta releases, if it does not deal with Beta releases - don’t use this category!

Useful Thunderbird Links [Thunderbird] (2)
About the Thunderbird category [Thunderbird] (1)
Can we mirror, or move, all newsgroups and mailing lists into Discourse? [Thunderbird] (2)
Consolidating Documentation and Communication [Thunderbird] (5)
Simple Thunderbird Build mach build failed, what next? (Docs suggestion) [Thunderbird] (1)
Does Thunderbird still use XUL? [Add-ons] (3)
Tunderbird Daily Builds - No Build Since 21 March? [Thunderbird] (4)
Viewing TNEF Emails. Core integration [Thunderbird] (6)
Thunderbird 60.0b3 not displaying Calendar [Beta] (3)
Theme Font and Size Changer—what's up with it now? [Add-ons] (5)
Addon For exporting all receiver names/emails to excel/notepad/word? [Add-ons] (2)
Can't add an add on to transfer wlive folders to thunderbird in w10 [Thunderbird] (4)
Problem with unified folder [Thunderbird] (3)
Widgets ‹dialogheader› disappearance [Add-ons] (5)
Can One submit a peticion for an update to an old addon? [Thunderbird] (2)
Legacy Thunderbird add-on: 'database' property of XUL <menu> element is undefined [Add-ons] (3)
Thunderbird Looking for Build Engineer (job) [Thunderbird] (1)
Help installing add-ons [Thunderbird] (5)
Help creating html email [Thunderbird] (1)
Enigmail in Google Summer of Code [Add-ons] (1)
Changing the subject of the incoming message in the mail client TB [Thunderbird] (2)
Create plugin for thunderbird to save attachments into a folder automatically created [Add-ons] (10)
Import a module… (Thunderbird Beta) [Add-ons] (4)
Question with respect to an add on / error meaasge related to GMail [Thunderbird] (3)
Design 404 Page for! [Thunderbird] (3)
Where to start developing? [Thunderbird] (5)
Base64 HTML Image Encoder For Thunderbird? [Thunderbird] (5)
Thunderbird and Gmail [Thunderbird] (2)
Error in language thunderbid [Thunderbird] (3)
Add-on request - better email editor window [Add-ons] (4)