In the current site, press the F12 key to enter developer mode , in the console console input: document.cookie get cookie values such as:
Copy you get cookie value, you or get Cookie by each method, for example: when people click on your link after adding parameter & docment.cookie,
For a browser, open the top of the cookie obtain site and click EditThisCookie, the corresponding key and value is added in, refresh the page, you can invade a success (note valid Cookie)
EditThisCookie is Google chrome extension, it is possible to store the Chrome extension to download and install, if you do not you can go to the following FQ Once downloaded to extract the files can be dragged into the extension: