Hello, in order to help you better I need the following information.
Please, send me the information listed here: http://en.savefrom.net/user.php?info=1

Could you please send a few links you can't download. We will check it out.

For the better understanding it'll be great to see a screenshot with the error.

Send links to files that you can not download.

Hello, we and our products do not affect the speed of downloaded files.

First, reinstall the extension and clean the browser’s cache and cookies:

https://addons.mozilla.org/firefox/addon/savefromnet-helper/

New version 8.37 has been released, reinstall the extension:

https://addons.opera.com/addons/extensions/details/savefromnet-helper/?display=en

Hello, unfortunately there is no technical possibility to do this.

¡Hola! Nuestra ayuda será más efectiva si copia y nos envía información sobre su navegador y de la extensión Savefrom.Net:
http://es.savefrom.net/user.php?info=1
También necesitamos algunos links que no pueda descargar (para probarlos).
Para tener mayor idea del problema, será de gran ayuda ver una captura de pantalla en donde se muestre el error.
Esperamos su respuesta, ¡gracias por ponerse en contacto con nuestro equipo Savefrom.net!

Hello, in order to help you better I need the following information.
Please, send me the information listed here: http://en.savefrom.net/user.php?info=1
Could you please send a few links you can't download. We will check it out.
Do you download via the extension SaveFrom.net Helper or the website SaveFrom.net?
For the better understanding it'll be great to see a screenshot with the error.

Hello, in order to help you better I need the following information.
Please, send me the information listed here: http://en.savefrom.net/user.php?info=1
Do you download via the extension SaveFrom.net Helper or the website SaveFrom.net?
For the better understanding it'll be great to see a screenshot with the error.

Hello, we’d like to help you, but we will need some info about your browser and the installed extension first.
Please, go here http://en.savefrom.net/user.php?info=1
Copy the details that you see and send them back to us.
Please also send us some video links that you can’t download.
Thank you for contacting Savefrom.Net support !

Hello, unfortunately there is no technical possibility.