#11 Thunderbird trunk hangs on startup when Custom Buttons is installed

[Jonathan Kamens]

Current Thunderbird trunk build (2017-10-05 is the first build in which I noticed it, though the problem probably starts earlier) hangs on startup when Custom Buttons add-on is installed and enabled. To start Thunderbird I need to launch it in safe mode, disable the Custom Buttons add-on, and then restart.

Looks like there's an incompatibility you're going to need to address before it gets released to the world and your add-on stops working.