I recently upgraded Thunderbird to 115.3.1, and a horrible change took place. I browse messages in split view, rightclick-delete unwanted messages from the message list on top. The new version - unlike the pre-115 - automatically selects (and opens in bottom pane) the next message closest to the deleted one. Needless to say this is a huge security flaw. I never want to auto-select or auto-open an unknown message. I am aware of the advanced "mail.delete_matches_sort_order" and the "close message window/tab on move or delete" switches, neither does anything useful anymore. I have an old, safe message at the top of my message list (sorted on oldest first), selected and opened while browsing the list, and in the previous version, even in the worst case it always kept viewing this safe message. But now it always switches selection to a neighbor (DOWN in the list) of the deleted message - but a neighbour of an unsafe message is usually another unsafe message regardless of sort type. The only temporary workaround I see atm is leftclick-drag messages to trash, but this is also unsafe because of occassional doubleclick. Thunderbird cannot be used safely atm? Should this horrible change be filed as a bug report somewhere? Please help.