Hello, the extension is not a virus.

You can install the extension individually in your browser: http://en.savefrom.net/user.php#helper_install

The problem is that Youtube gives out links tied to the country,
The problem does not depend on the browser, but depends on the specific video.
We know the problem and are trying to find a solution.
You can use our services with the Ummy Video Downloader program and the Savefrom.Net extension:
https://videodownloader.ummy.net
http://en.savefrom.net

Hello, what’s your country?

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, you can download the video.

Please, send me the information listed here: http://en.savefrom.net/user.php?info=1

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, this is not the correct work of the WebExtensions browser API that causes the extension.
In the previous version of the extension we used the Add-on SDK, in which the implementation of the save dialog was written by us,
WebExtensions does not allow you to do this and forces you to use regular tools.

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?

Hello, this extension has been fixed. Please, update or reinstall it from our site.
The latest version is 7.41: http://en.savefrom.net/user.php#helper_install
Thank you for using Savefrom.Net browser extension

Thanks for using our resources.