Short wave lift

How do I Login to a website blocked by my schools stupid system.? - get megaupload cookie value

I try to access my school, I MegaUpload.com and blocking the website linking. He had already created in my Firefox browser registered (at home) and a cookie and saved me when we've identified them, so that there is a problem, but now I'm over Google's Chrome browser and I must be high but I do not know. This login information will be held in a cookie that can be transferred again?