It works, it always works, and it works fast. Also great customization for how files are downloaded, named, and their saved formats.

更新でダークモードも対応して頂けて感謝

simple and easy-to-use, the best extension available.

便利にご利用させていただいてましたが、どうも最近ボタンが表示されないことがあり（何度か更新すると出ましたが）、直近のPixivの更新から全く表示されなくなりました。アップデートをゆっくり待つことにします。

Excellent all my Pixiv downloads now are A Okay !

Thank you for updating it!

Thank you for updating it, for those who still can't figure out, you kinda need to uninstall and reinstall it because Firefox Addons are having issues updating.
I can confirm it works perfectly fine now.

It's still NetworkError in every image
here is the sample image url
https://tc-pximg01.techorus-cdn.com/img-original/img/2016/03/04/03/29/28/55612025_p0.png

edit: thanks for fixing the addon

does it work now? In my case, even after udpate to version 3.4.3, it does not work..
before this error it was a great add-on.

It does not work any pixiv image(png or うごイラ)

after 3.4.4)
Now it works great.
Thank you for great add-on and fixing it

2/21 Still can't download image, the windows Still show "NetworkError when attempting to fetch resource"

2/24 Today the plugin function is working normally Thank you for your help =D

2020-02-23 It working now,thank you for updating it~!~!
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2020-02-22 anyone image/url:(
更新3.4.3后依然出现“NetworkError when attempting to fetch resource.”

2020-02-19下载时出现“NetworkError when attempting to fetch resource.”

^_^

FIXED IT! The following was translated from another reviewer:
This add-on is very good!
At first I stopped using it because it seemed broken, but recently I noticed that the download button "Px Downloader" is somehow "invisible".
If you hover your mouse over where the download button should be, you will notice that the mouse pointer changes shape to hyperlink. It means that the button is present, but invisible. At least that's my case...
I hope this helps you until the problem is finally solved.

NetworkError when attempting to fetch resource.