Review for Attachment Extractor by thundernl
Rated 4 out of 5 stars
Doesn't work for messages in Gmail IMAP folders but works after copying the messages to local email folders and try to extract attachments from there. Thunderbird 115.7.0, macOS Sonoma 14.2.1. No files extracted and no error message.
Also embedded images are not saved and can't be detached/deleted.
To create your own collections, you must have a Mozilla Add-ons account.