Start here, I guess: https://mail.mozilla.org/pipermail/dev-addons/2016-December/002367.html https://mail.mozilla.org/pipermail/dev-addons/2016-December/... (I

Start here, I guess: https://mail.mozilla.org/pipermail/dev-addons/2016-December/002367.html https://mail.mozilla.org/pipermail/dev-addons/2016-December/... (I've had to troubleshoot issues with Firefoxes being subtly broken due to how DTA injects into the network stack. That made for a rather biased reading of the above thread.)