Here are the instructions for clearing cookies and cache in browsers:
Microsoft Internet Explorer (Windows)
From icon of a gear:
Tools -> Safety -> Delete browsing history…
Choose “Temporary Internet files and website files” and “Cookies and website data”
Click [Delete]
Google Chrome (Windows or Mac)
From icon of three horizontal lines:
Tools -> Clear browsing data…
Check “Delete cookies and other sit and plugin data” and “Empty cache”
Click [Clear browsing data]
Mozilla Firefox
From dropdown on Firefox button:
History -> Clear recent history…
Check “Cookies” and “Cache”
Click [Clear Now]
Safari (Mac) - clears just browsing history
Safari -> History -> Clear History…
Safari (Mac) - clears cookies, cache, etc
Safari -> Preferences -> Privacy
“Remove All Website Data”
Below are links to instructions for setting third party cookies, which are sometimes necessary for some of the features in Blackboard, for instance.
Chrome support.google.com/chrome/answer/95647?hl=en
Firefox for Mac support.mozilla.org/en-US/kb/enable-and-disable-cookies-website-preferences
Firefox for Windows support.mozilla.org/en-US/kb/disable-third-party-cookies
Internet Explorer windows.microsoft.com/en-us/windows7/block-enable-or-allow-cookies