Hi Austin, you are right to be suspicious, this is a fake patch that installs malware. Over the past two weeks they have constantly created new sites to bypass the reputation filters built into Firefox -- by default, Firefox doesn't load sites known to distribute malware; this data is compiled by Google and you can submit sites to Google here: https://www.google.com/safebrowsing/report_badware/ The prevailing theory is that one or more advertising networks are spreading an ad that causes a new window or tab to open with that page. Do you recall or can you tell from your wife's history what site she was viewing when it opened? Do you share the same Firefox with your wife? Just wonder whether your ad blocker makes any difference in seeing or not seeing this popup.