No it certainly is not legit. The fake firefox-patch.exe can install things like trojans, viruses, or unwanted software based on past reports.

The desktop Firefox is not just for Windows as it is for Mac OSX and Linux also so .exe would not be an effective way to send out Firefox updates. The updates are done internally in Firefox (with a .mar type of file) or by download from mozilla.org like say www.mozilla.org/firefox/all/

Even if Mozilla were to use .exe for Firefox updates on Windows, they would be serving them from a *.mozilla.org url and not from random websites with weird names and a long random stuff on end.

You could try using a adblocker extension like uBlock Origin https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/

Unfortunately this has gone on for a month now with one or two new sites reported almost everyday. https://support.mozilla.org/en-US/forums/contributors/712056/69469/

Thank you.

The FAKE Firefox "ads" are still appearing and they "look" real.

I wish that the real Firefox would take legal action against these !@#$%^&*()_ .

How about a class action lawsuit against them, as in Top Class Actions on the internet?

The fake patch files have since changed to a firefox-patch.js starting July 11 probably because the .exe files even if compiled recently were getting blocked or flagged in different ways.

Whomever is doing this is not only trying to trick Windows users using Firefox but also Google users on Windows in last while in similar fashion.

A problem is only those who got one of these urgent update links could see it so it is harder to replicate in finding the ad system that is being used for this fake ad redirect on what can be legit sites.