Also getting annoyed by always have to go to the menu item
View – Sort By – and then select ‘Unthreaded’?
Just change the default for new folders and views!
Settings – General – Config Editor
Search for the following keys and set them to the desired values:
mailnews.default_sort_type (make sure it is set to 18)
mailnews.default_sort_order to 1 (ascending) or 0 (descending)
mailnews.default_view_flags to 0 (unthreaded) or 0 (threaded)
(And if you want to expand all messages by default then add 32 to the previous value, so enter 32 or 33 as default_view_flags.)
here's some off-the-cuff documentation: Prefs are named as follows; first three apply to Mail and RSS folders, the second three to Newsgroups. mailnews.default_sort_order mailnews.default_sort_type mailnews.default_view_flags mailnews.default_news_sort_order mailnews.default_news_sort_type mailnews.default_news_view_flags In about:config (Tools | Options | Advanced | General, Config Editor), you can enter "news._def" to filter out all the prefs but these. sort_order: byNone 17 byPriority 23 byLocation 29 byDate 18 * byStatus 24 byTags 30 bySubject 19 * bySize 25 byJunkStatus 31 byAuthor 20 * byFlagged 26 byAttachments 32 byId 21 ** byUnread 27 byAccount 33 byThread 22 byRecipient 28 byCustom 34 * = commonly desired values ** = by Order Received (?) sort_type: ascending 1 descending 2 view_flags -- the second group of values can be added to one of the first group to combine effects, with several limitations: Unthreaded 0 Threaded 1 Grouped 64 [mail only (?)] ShowIgnored 8 [news only] ShowUnreadOnly 16 ShowExpanded 32 [doesn't seem to work] ShowUnreadOnly will check the View|Threads|Unread menu; this will cause only unread items to be seen, but doesn't force a threaded view.
The source for the values above is: here
That’s all folks.
Have a nice day!