I understand that the developer of the FiltaQuilla AddOn is busy and may not be available to make the necessary updates to conform to Thunderbird 78. I had used FiltaQuilla to allow me to detach files from multiple emails using a filter. This seems like a feature that would be useful to many other users. Is there any chance that the Thunderbird developers will ever change the functionality of the Attachments - Detach All feature to enable it to work on multiple emails? e.g. so that you could create a filter and detach all the attachments of multiple emails to a particular folder.