That definitely does NOT sound official. If you saw an orange page with a Firefox logo that popped up a download dialog, no, that's probably a fake update/patch which installs malware on your system if you open/run it. Unfortunately, anyone can create an orange web page and steal the Firefox logo image, so you definitely cannot rely on appearances. Recently, these phishing/malware sites are launching on new addresses every day, outstripping the ability of Firefox's built-in bad site blocker to keep up. Since the redirects to these sites seem to be pushed by ads on popular sites, you could consider using an ad blocking extension such as: https://addons.mozilla.org/firefox/addon/ublock-origin/ If you want to report the site as a fraud: [[I found a fake Firefox update]] And if you did open/run the download, please try cleaning your system using Malwarebytes Anti-Malware (the free version or trial version will work): https://www.malwarebytes.com/mwb-download/ You also could try some of the other tools or specialized forums in our support article: [[Troubleshoot Firefox issues caused by malware]].