This is the first time i meet the penguin. I been into SEO for 4-5 months now and this is the first time i been tracking my rankings during a G update. I see rankings drop 2-3 spots mainly, but also 1 kw lost more than 10 spots ( 1 page). Does this mean I have been penalized or is there nothing to worry about for me? Also another question, I been using chrome to surf.. is it better to use firefox instead? Maybe they can track me because i use their browser?