Which browser works best with GPT offers & why?

I want to know hich browser works best for GPT offers. I know FF & Chrome are recommended. But FF doesnt seem to work well on my PC. I tried chrome now, but how can I delete cookies without deleting the GPT sites cookies and having to log back in again after every offer? Do I have to clear browsing history or cookies on chrome and also use the ccleaner? I want to know what I can do to not have to login every single time.