mozilla/addon-sdk — pull request #1730 by fred-wang (2014-11-21 15:05:01+00:00)
Title: Bug 1100644 - Declare some low-level modules compatible with Thunderbird...

.... r=erikvold

This is the same as https://github.com/mozilla/addon-sdk/pull/1707

As for SeaMonkey, I'm not sure whether it's very useful to use them directly and I didn't test them with Thunderbird.