Rated 5 out of 5 stars

by Gabriel on سپتامبر 17, 2018 · permalink

There's a very simple fix to enable this addon in Thundebird 60:
1. Set extensions.strictCompatibility to false
2. Open <profile path>/extensions/reply-to-all-as-cc@clear-code.com/content/composeOverlay.js
3. Replace 'listitem' with 'richlistitem' in line 43
4. Restart Thunderbird