How to keep messages from automatically being marked as read
Whenever a single message or conversation is selected, by default it will automatically and immediately be marked as read. Under Preferences > Advanced > General you can change this behavior to:
- Not immediately mark messages as read.
- Mark messages as read only after a few seconds, so you can glance at a message, and then move on to another before it can be marked as read.
Additionally, for conversations there's a hidden preference to not have messages marked as read when you select the conversation summary row. To set this:
- Open Config Editor.
- Enter pb.always_mark_as_read into the "Filter" textbox.
- Double-click on pb.always_mark_as_read to change the value from true to false.