Most people know that you can control some Flash playback settings by right-clicking (Option-click on a Mac one-button mouse), but did you know that there is a Settings Manager for Flash? Naturally, you access it through a Flash image, which you find at this link.
Websites might occasionally want to store information, such as your high score from a Flash game or what products you have purchased, to your computer. On the Global Storage Settings panel, you can control how much disk space websites may use to store information and can also prohibit websites from storing any information at all. If you prohibit websites from storing information, the website might or might not function as intended.
Not sure how long this has been around (probably forever), but I’m guessing a lot of people don’t know about it. It was news to me.