Thunderbird/Add-ons Guide 57: Difference between revisions

<big>'''Add-ons Guide for Thunderbird 57 and beyond'''</big>

'''Legacy add-ons''': Despite Mozilla core interface removals, Thunderbird 57-60 and Seamonkey will '''<u>still support</u> legacy add-ons <u>if</u> appropriate modifications are done to the add-on to adapt to the changed interfaces'''.  Core interface changes and removals have come because Firefox platform have disabled "legacy" add-ons (add-ons which are not based purely on WebExtensions) in Firefox 57. Beyond version 60 is less certain, given the extreme rate of change in Firefox platform code. We will work with add-on authors in the coming months to determine a viable post-60 add-on strategy.

'''WebExtension''': WebExtension does not exist yet in Thunderbird. Thunderbird will be adding WebExtension support ({{bug|1396172}}) while maintaining "legacy" add-ons and hybrid add-ons.  

'''Questions and Help''': Add-on developers can get help in the mozilla.dev.apps.thunderbird newsgroup (the traditional venue) or in maildev mailing list. (see [[Thunderbird/CommunicationChannels#If_you.27re_a_developer]] These forums have more people available to help you than bugzilla and other locations, so please ask in a forum before filing a bug report in bugzilla. And also test and fix your add-on using the latest [http://www.mozilla.org/thunderbird/channel/ beta version] of Thunderbird.