Flash web pages can be used to play free online slots games. Because many of the so-called “free slots” actually utilize Java and Flash software your browser has to be compatible with Java or Flash to play the majority of games. In addition certain browsers don’t support or work with certain of the controls in the flash player which are used in free slots games. You might need to use a different web browser or player to play free online slots. HTML5 is generally supported by all current web browsers.