There are a few features from Netscape 4.x that I'd consider "must have" before I could make serious use of the newsreader.
Ability to select several newsgroups at once and right click to mark them all as read without downloading anything. Bug 36538 implies this isn't possible at the moment because Mozilla can't select a newsgroup without downloading it. Ability to select several messages at once and right click to save them all into one file. Newsreader must be able to show the References: header. Michael
