Weirdly, in Firefox 7zip.com is blocked but www.7zip.com isn't. If you type '7zip' in the address bar and then press Ctrl+Enter to go to the address, you'll get

Weirdly, in Firefox 7zip.com is blocked but www.7zip.com isn't. If you type '7zip' in the address bar and then press Ctrl+Enter to go to the address, you'll get owned, because that key-combo adds the www at the beginning.