The nsMsgViewFlagsType interface contains constants used for view flags in Thunderbird. This interface isn't ever implemented. It is only used to store constants. For example, the 'unread only' view would use the flag:
Components.interfaces.nsMsgViewFlagsType.kUnreadOnly
| Name | Value | Description |
kNone |
0x0 | |
kThreadedDisplay |
0x1 | |
kShowIgnored |
0x8 | |
kUnreadOnly |
0x10 | |
kExpandAll |
0x20 | |
kGroupBySort |
0x40 |