CAESARjr said

Может, обновление не прошло, почему тогда указана версия 39.0? http://s019.radikal.ru/i616/1508/60/65432dee9570.png

Translation: I just upgraded to version 39.0, but still have such troubles here: http://s019.radikal.ru/i616/1508/60/65432dee9570.png

your useragent (the information the browser sends to websites to identify its version) - apparently mistakenly - shows you're on firefox version 3.0.5. probably some sort of toolbar or adware has overwritten it. please refer to this article in order to reset the user-agent settings in firefox: How to reset the default user agent on Firefox