Enhancements
- Added heuristic to detect maliciously added unsigned headers (#102).
- Configurable option to warn about unsigned headers that are recommended to be signed (#102, #277).
- Improved theming of header icon in Thunderbird 102.
- Authentication-Results header: Prefer to show failure results that include a reason and are related to the sending domain (#247).
Fixes
- Fixed error when opening messages in a new window in Thunderbird 102.
Other
- updated default rules and favicons