User Agent: Mozilla/5.0 (Windows NT 6.0; rv:52.0) Gecko/20100101 Firefox/52.0 Build ID: 20170802111520 Steps to reproduce: Using Windows Vista - not tested on other OS. TB 52.3.0 In Folder Pane Select either mail account name OR a folder (but not an email) via' Menu Bar': 'Edit' > 'Find' > 'Search Messages' is available. via 'Mail toolbar': Menu icon' > 'Find' is disabled. If you select a folder and then select an email in the list to open email: via' Menu Bar': 'Edit' > 'Find' > 'Search Messages' is available. via 'Mail toolbar': Menu icon' > 'Find' > 'Search Messages' is available. Actual results: If you do not have the 'Menu Bar' enabled then you cannot use 'Search Messages' via 'Menu icon' unless you have opened an email because 'Find' offers no sub menu. As a workaround :You can still use the method right click on folder > 'Search Messages' and then select to search on the account name. Expected results: via 'Mail toolbar': Menu icon' > 'Find' > 'Search Messages' being enabled should not depend upon opening an email. It should be auto available and enabled.
'Menu icon' = three horizontal lines icon.
Created attachment 8903941 [details] [diff] [review] findMenu.patch I changed the split menu to a normal menu. With this we have no more the functionality to click on "Find" and the searchbar appears but only a normal menu where you have to click on "Find" and then on "Find in This Message..." to show the searchbar. But the advantage is the menu is always enabled and the "Search Messages..." and the "Search Addresses..." are always accessible.
Comment on attachment 8903941 [details] [diff] [review] findMenu.patch Thanks, I had a personal demonstration ;-)
Pushed by email@example.com: https://hg.mozilla.org/comm-central/rev/bf3e7a1f9092 Change the "Find" splitmenu to a normal menu. r=jorgk