Cookies are files, often including unique identifiers, that are sent by web servers to web browsers, and which may then be sent back to the server each time the browser requests a page from the server.
Cookies can be used by web servers to identity and track users as they navigate different pages on a website, and to identify users returning to a website.
Cookies may be either “persistent” cookies or “session” cookies. A persistent cookie consists of a text file sent by a web server to a web browser, which will be stored by the browser and will remain valid until its set expiry date (unless deleted by the user before the expiry date). A session cookie, on the other hand, will expire at the end of the user session, when the web browser is closed.
Most browsers allow you to refuse to accept cookies.
(1) in Internet Explorer you can refuse all cookies by clicking “Tools”,
“Internet Options”, “Privacy”, and selecting “Block all cookies” using thesliding selector;
(2) in Firefox you can block all cookies by clicking “Tools”, “Options”,
and un-checking “Accept cookies from sites” in the “Privacy” box.
Blocking all cookies will, however, have a negative impact upon the
usability of many websites.
You can also delete cookies already stored on your computer:
(1) in Internet Explorer, you must manually delete cookie files;
(2) in Firefox, you can delete cookies by, first ensuring that cookies are
to be deleted when you “clear private data” (this setting can be changed by clicking “Tools”,
“Options” and “Settings” in the “Private Data” box) and then clicking “Clear private data” in the “Tools” menu.
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