Rated 5 out of 5 stars

If it helps, some on my side Thunderbird's built-in keyboard shortcuts sometimes (only sometimes??) take priority over Nostalgy shortcuts. For example "S: Add a star" instead of S: Save". I solved my problem via the Thunderbird configuration editor and passing the following 2 parameters to False:
- accessibility.browsewithcaret_shortcut.enabled
- ui.key.textcontrol.prefer_native_key_bindings_over_builtin_shortcut_key_definitions

This review is for a previous version of the add-on (4.1.2).