This is top rated user on Codeforces back in 2010

This is top rated user on Codeforces back in 2010

I used mirror codeforces to login two accounts in 1 browser but it's 3 weeks since i can't access that link because when i go to that website, its a download link. 
UPDATE: mirror codeforces website is back!!!
I want to ask what is the difference between 2 codeforces website: codeforces.com and mirror.codeforces.com