The developers of Thunderbird have withdrawn version 115.4.0 and released version 115.4.1 of the email program. Thunderbird 115.4.0 had a major problem, which caused the version to be replaced. Thunderbird 115.4.1 itself does not get any new features, but takes over those that were announced by the change to Thunderbird 115.4.0. A new context menu with the “Get messages” button has been created as a quick access option to retrieve new messages for individual accounts. In addition, newsgroups subscriptions can now be displayed in the account center. You can see the overview of the fixed bugs here.