User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0 Build ID: 20180315163333 Steps to reproduce: I setup many message filters which move incoming messages into folders of a big, big message folder tree. So a moved unread message is oftentimes not sorted into a second level message folder but into a sub-sub-sub folder. After auto-movement of such a unread message all its parent folders up to the root are marked with a colored text indicating that somewhere deep in its tree an unread message exists. When I right click on the topmost folder and select "Mark folder read" from context menu then nothing happens since it only marks messages as read only directly in this folder but not on lower levels. However I need a "Mark folder read" context menu which looks into the whole message folder tree and marks all messages as read. Actual results: See above Expected results: See above

This is covered in bug 500762