Big annoyance is that it overwrites each website with a Prompt to Sign-in to Google -- even though this prompt is turned off in Google Account settings. The annoying popups obscure websites and does not identify that it's coming from DownThemAll!

Very confident and efficient

used for sometime, recently it reset the download and restart from beginning on a large file which made me frustrated. it doesn't split the file and do multi-threaded downloaded.

actually does what it claims, which is exceptionally rare, especially for an addon of this type

I do not know how to use

On a page of archive.org links direct to mp3 files, it sees not one of them. It has no way to define the download directory or choose each time.