Rated 5 out of 5 stars

Very useful add-on. Looking forward to seeing this working again in TB 115+! The recent updates in Bugzilla give me hope the necessary API will be provided in the near future.

To the developer: would it be possible to have an update message displayed in Thunderbird 115+ once the add-on works again? Reason: Sender Frequency was automatically disabled for users, but it probably won't be enabled automatically?