I found this post with instructions from 2013: https://kewisch.wordpress.com/2013/06/13/the-thunderbird-remote-debugger-is-alive/ I have "Allow Remote Debugging" checked in local build of Thunderbird and "devtools.debugger.remote-enabled" as true in FF, restarted FF, etc. In FF's about:debugging I click connect to localhost:6000 (and 6080) and get a "Connection Failed" message. Maybe Philipp knows what to try next?
Bug 1631919 Comment 9 Edit History
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I found this post with instructions from 2013: https://kewisch.wordpress.com/2013/06/13/the-thunderbird-remote-debugger-is-alive/ Edit: and this https://developer.mozilla.org/en-US/docs/Tools/Remote_Debugging/Thunderbird I have "Allow Remote Debugging" checked in local build of Thunderbird and in FF, and "devtools.debugger.remote-enabled" as true in FF, restarted FF, etc. In FF's about:debugging I click connect to localhost:6000 (and 6080) and get a "Connection Failed" message. Maybe Philipp knows what to try next?