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Renamed "Add-ons Guide 62" to Add-ons-Guide 63"
<big>'''Add-ons Guide for Thunderbird 57 to Thunderbird 60 ESR'''</big>
(For developer information about Thunderbird 61 and beyond visit the [https://wiki.mozilla.org/Thunderbird/Add-ons_Guide_62 ons_Guide_63 Add-ons Guide 6263]. Note: Thunderbird 61 and 62 betas have been skipped. The next beta after 60 will be 63.)
'''Ask Questions and Get Help''': Developers are encouraged to get help and advice in the mozilla.dev.apps.thunderbird newsgroup (the traditional venue) or in tb-planning mailing list. (see [[Thunderbird/CommunicationChannels#If_you.27re_a_developer|Communication Channels]] Please check this document and ask questions in a forum before filing a bug report. Also, test and fix your add-on using a [http://www.mozilla.org/thunderbird/channel/ beta version] of Thunderbird - do not use nightly builds (currently version 63) for testing changes for version 60.
