no search bar in firefox

Hy,
i use firefox 49 on linux and i noticed that there is no search bar on the site. With chrome it works fine.
Again just a little glitch, nothing to bad.

I use FF 49 on linux but can see the search bar I run out of ideas

Is it a plugin or something NO-Script or privacy badger could kill???

Edit :
IT IS !
I already authorised yandex.ru but then it need yandex.net…
Maybe a little warning could be nice (not a alert though that would totaly suck !!!!). I run on low hardware and No script i find helps a lot with web page loading time but sometimes you get to miss cool features to.
Sorry for that.