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When using Google Chrome, click on Tools > Options (or preferences if using a Mac), browse to Advanced and find Privacy section. (More info: https://support.google.com/accounts/answer/61416?hl=en)
When using Firefox on Mac, go to Preferences > Privacy > Show Cookies. If using Firefox on Windows, go to Tools > Options > Privacy > Show Cookies. (More info: https://support.mozilla.org/en-US/kb/enable-and-disable-cookies-website-preferences)