EDIT: Update on review.
Removed this crapware after trying it again. It never resumes anything. In-fact, downloads which can be resumed normally are canceled regularly with this extension.
I needed a download manager to queue downloads one by one and this works fine alright since "Download Them All" doesn't work anymore.
BUT, Download Manager has a lot of issues.
First of all, if you pause all downloads, you resume... ALL DOWNLOADS. Yeah. Download Manager forgets the fact that it's supposed to download one file at a time, like it's set in settings. It just resumes EVERY file you're downloading.
And if you pause these files? The download gets stuck or broken.
About the broken, I have to basically go and double check if every file downloaded actually downloaded fully or not, especially audio files. Sometimes, Download Manager shows download as "completed" but when you open download folder, the download still has ".part" files, meaning it never finished downloading and stopped at some point.
So you end up going back and re-downloading the same file, wasting bandwidth all over again and wasting time double checking every file you're downloading.
Then there is the annoyance where if the download fails for some reason, the download file CANNOT be cleared from the download history or download bar. No matter how many times you cancel it, or clear it. The download refuses to go until you restart browser.
Basically, this addon needs to fix all these issues. Right now the only thing it's good for is queuing downloads.