How can I download a file when I visit the website using an online proxy server? I cannot visit some websites directly. I can browse the webpage using some web based proxy servers, but I cannot download the files which I need.
Use Tor as your proxy. It fires up a special copy of FireFox that runs through the Tor network and changes exit points randomly. You're then safe, anonymous, untraceable, unblockable (unless your network administrator blocks tor), and it works like a normal browser, so you can still download.