If Safari is behaving oddly, maybe loading very slowly or crashing while other browsers or devices are working fine, you can use the Reset Safari command from the Safari menu to clear out some or all of its cached data. In the vast majority of cases, this action restores speed and responsiveness to the browser. Bear in mind that you might want to uncheck the option to remove all saved names, passwords and autofill data since many people rely on the browser to remember the many logins they have.