Rated 3 out of 5 stars

The description of the extension says "extracted items are not deleted from the associated messages", however, the screenshots show the words "detached/deleted attachment(s)" and "Permanently Detach", which can be interpreted as the ability to delete attachments from messages. So, does this extension have the ability to delete attachments from messages while saving the text of the messages, or not?

This review is for a previous version of the add-on (1.4.2). 

Perhaps I should revise the verbiage. The extraction process itself does not by default eliminate the attachment from the email message; detachment (deletion) is a separate action/process. I apologize for your confusion.

UPDATE: The extension details have been clarified accordingly.

Rated 5 out of 5 stars

Before Extract'Em was available, I tried a number of attachment extraction addons. Most of them had serious limitations or did not work with recent versions of Thunderbird. Extract'Em allowed me to extract a large number of attachments from more than 30,000 mails. I encountered a problem with deleted attachments but this was fixed very quickly by the developer.
Many thanks for this particularly useful addon.

This review is for a previous version of the add-on (1.1.2). 

Rated 5 out of 5 stars

I was able to backup about 170,000 attachments in over 55,000 emails thanks to Extract Em and clear out space on my email inbox. I had tried the extension called Attachment Saver and that only backs up 600-700 files in one zip so that didn't work for me. Other addons weren't supported by newer Thunderbird versions. So I'm glad this extension works as advertised even for large operations. The dev was fast to respond and to fix an issue with my use case so I'm thankful for that as well! Thanks for making this extension

This review is for a previous version of the add-on (1.1.1).