firefox auto .php page open

i have a problem with my pc which i recently formatted
i have windows 8.1 x64bit os
since formatting i am facing a problem where an .php page opens in firefox(default browser) with info about world richest country or worlds largest country etc. it opens after a certain amount of time (didnt track d interval)
tried malware bytes and junk removal tool but it didnt work
please help me getting rid of this


http://www.rich-countries.net/switzerland.php


above link is one of the page that opens on random basis :(
2 answers Last reply
More about firefox auto php page open
  1. change your home page? any toolbar? extension? plug-ins?
  2. rgd1101 said:
    change your home page? any toolbar? extension? plug-ins?


    no toolbar no plugin and homepage is google
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