Comment 2 for bug 397211

http://www.dailymotion.com/openvideodemo has already been brought up in the other bug report. Since open video is one of the big things that's new in Firefox 3.5 it is very confusing to someone who just installed it to be told they need to upgrade. So confusing, in fact, that there *is* a bug report just for this site.

http://www.facebook.com/ is the site I had problems with. Load up home.php when you are signed in and instead of having integrated chat, there is a 'open facebook chat' that also informs you of using an older browser and suggests you update to Firefox.

Both of these work properly when the user-agent is set to "Firefox/3.5"

I tried testing mail.live.com but it's having problems signing me in... Anyways, I'm sure this is enough to justify this simple change