firefox 57 update?

[ckonn]

hello,

newly when I go to http://convert2mp3.net/en/index.php

and download a video appear a little strange window, pretending to be a update for
firefox.

Is this update genuine of some kind of malware?

thanks in advance

[Pjotr]

Malware of course. Almost certainly for Windows.

The only reliable updates for your Firefox, are being delivered by Update Manager. No exceptions.