This is not from Mozilla or the Firefox web browser. The fake firefox-patch.exe and firefox-patch.js files can install things like trojans, viruses, unwanted software or to download additional stuff onto Windows based on past reports if the user runs them. The random name of the websites alone should raise a flag that it was not legit.

The Firefox updates have not changed as they are done internally in Firefox (with a .mar type of file) whether on Windows, Mac OSX or Linux (since Firefox 1.5 almost eleven years ago) or by download from mozilla.org like say www.mozilla.org/firefox/all/

You could try using a adblocker extension like uBlock Origin to block theses fake ads if you keep getting them. https://addons.mozilla.org/firefox/addon/ublock-origin/

Unfortunately this has gone on for a while now with one or two new sites reported every so often though not as much in last couple weeks. https://support.mozilla.org/en-US/forums/contributors/712056/

Even if you were to download this firefox-patch.js file it is not a risk unless you were to try and run it.

https://support.mozilla.org/en-US/kb/i-found-fake-firefox-update

http://imdb.com/ is a good site.

You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.

FredMcD said

You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article. Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.

This malicious ad has not been determined to be caused by any form of malware and the person or group behind this even targets Chrome users on Windows with a similar fake urgent Chrome update Ad.

Still not a bad idea to scan Windows every so often.

Thank you James and FredMcD. It was not clear to me as to how to submit pages as fraudulent / malicious. I posted this here to bring attention to this page specifically so that the appropriate actions can be taken. I have encountered a few pages where Firefox will warn of a possible malicious website and warn me before attempting to access the page. I perform regular weekly scans on my computer as I use it to access other computers to provide support.

ZeroGeined said

I posted this here to bring attention to this page specifically so that the appropriate actions can be taken. I have encountered a few pages where Firefox will warn of a possible malicious website and warn me before attempting to access the page.

Taking action or blocking these sites is a bit pointless since the sites are disposable in being used for about a day or so for the fake updates for Firefox (and Chrome).

Taking action or blocking these sites is a bit pointless since the sites are disposable in being used for about a day or so for the fake updates for Firefox (and Chrome).

Understood. Thank you.