Changes in Thunderbird 111

messageDisplay API

  • Improved open(openProperties) to honour the location property also for external messages. They can now also be opened in tabs.

protocol_handler API

windows API

  • Fix create([createData]) to properly support top and left properties.

  • Fix beforeunload event not fired in popup windows. Note: There must have been some sort of interaction with the window (for example a mouse click into the window), for this event to be fired when the window is closed.

Bugzilla list of all fixed WebExtension API bugs in Thunderbird 108, Thunderbird 109, Thunderbird 110 and Thunderbird 111.