Letitbit First Issue Number

Recently, I and many of my friends (specifically interviewed) when searching on Yandex began to experience the following situation:

When you click on the first position of issue, a completely left page opens (for example, RBC), which has nothing to do with the fact that the first position should come out (checked)!

When you click again, everything works as it should.
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Hence the questions:
- I'm a sucker and this is some kind of dupe?
- I have a terrible Trojan on my computer, which I send to all my friends. Will he destroy my system and then my brain?
- Is this some kind of super new advertising offer from Yandex?

UPD by commenting:

The problem is caused by the plugin for FF, installed with the hosting file letitbit.net. In fact, this is an advertising trojan that artificially “adds” to the issue of the advertised site.

Solemn killing of a plug-in solves a problem!