Today, 2013 Dec. 17, Secunia PSI warned that my Firefox 25.0.1 was at "End-of-Life" & implies that 26.0 is available somewhere. ---START--- Program Name: Mozilla Firefox 25.x Security State: End-of-Life Download Link: http://dl.secunia.com/SPS/Firefox_26.0-24.2.0esr_en-US_SPS.exe Instances Found: C:\Program Files\Mozilla Firefox\firefox.exe, version: 25.0.1.5064 Last System Scan (localtime): 15. Dec 2013, 15:03 Operating System: Microsoft Windows XP Professional, ---END--- I also found something called 'Firefox Setup Stub 26.0.exe', which I don't think is big enough to be valid. Firefox>Help>About>: confirmed Firefox 25.0.1, but indicated that there are "Updates available at https://www.mozilla.org/en-US/firefox/new/", but (see attached image) there, it says, "Congrats! You are using the latest version." but the illustration shows Firefox with another format (perhaps only as it appears in Win7/8) without comment. What's going on?