Glad to see it come back.
This are somewhere need to be improved, sush as Merge download button ，double click file with no popup window.

Now it's update for support FF57+~
Thanks~

Thank's a lot! This is the most missing extension since firefox 57

Its finally back. I missed you soo much. Had to use 3 other extensions in combination to get remotely what this 1 extension provided

The worst part of Firefox "Quantum" was the loss of Download Manager (S3). I had pretty much given up on this extension working again, and was just trying my best to accomplish tasks without it, using Ctrl+J to open a downloads menu, but it made me sad every time. Then suddenly I noticed something was different... Because it was still hanging out in the Legacy Extensions area of my add-ons, this extension updated itself and started working again. This will save me quite a bit of time and frustration with dealing with downloads. Until Firefox gets a better way to deal with downloads, Download Manager (S3) is a must-have for just about anyone. I will be making a contribution to thank the developer for putting in the time to keep this great extension updated.

Thank you for making it work in Quantum! I've missed it sooo much! :) I just love all of it's features - it takes very little space and yet you can quickly view all the details and monitor the download progress.
Great job!

Hurrah! It's back and compatible with the latest version of Firefox. You've no idea how much I missed having this app manage my downloads - simply, quietly and efficiently. It made life so much easier and was always a "must install" on every new system I built. I'm delighted that it's back and recommend you install it too.

Yes!!! Thank you so much for bringing this back! One of the most useful add-ons I have.

Thanks god, this greatest add-on is back to FF.

Thx for the comeback, it's the best download manager and one of the best add-on. Installed on Chromium too

I left it without erasing, I noticed that the add-on is worked.
I've been waiting for this day to come.

Урра! наконец-то работает в FFQuantum! Спасибо! Хоть Вы и сказали, что ничего не получится, удалять аддон не стал. И не зря =)
Best regards!

Thank you for coming back to Quantum!