Confirming for TB 91.5.0 (64-bit), Win10. STR 1. Enable New Address Book via pref: mail.addr_book.useNewAddressBook=true 2. Open New Address Book (Ctrl+Shift+B) 3. Open a composition window side by side with TB main window which shows AB 4. Select contact 1 (henry@example.com) 5. Drag contact 2 (jane@example.com) to To field of composition Actual - contact 1 (henry...) got added Expected - only contact 2 (jane...) was dragged, so it should have been added. - to achieve this, contact 2 (jane...) should have been selected when the drag was started on an unselected card without any modifier keys like Ctrl pressed (but with Ctrl-drag, actual result of adding contact1-henry only would have been correct). - Same behaviour as in TB 91, current AB.
Bug 1732553 Comment 7 Edit History
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Confirming for TB 91.5.0 (64-bit), Win10. STR 1. Enable New Address Book via pref: mail.addr_book.useNewAddressBook=true 2. Open New Address Book (Ctrl+Shift+B) 3. Open a composition window side by side with TB main window which shows AB 4. Select contact 1 (henry@example.com) 5. Drag contact 2 (jane@example.com) to To field of composition Actual - contact 1 (henry...) got added Expected - only contact 2 (jane...) was dragged, so it should have been added. - to achieve this, contact 2 (jane...) should have been selected when the drag was started on an unselected card without any modifier keys like Ctrl pressed (but with Ctrl-drag, actual result of adding contact1-henry only may have been correct - see comment 12). - Same behaviour as in TB 91, current AB.