What version of Windows and what browser/version do you use? For now, there is a "fix" for Chrome to keep the Flash setting, even after you close it. Type, without the quotes, "chrome://flags" into Chrome's address bar and hit the enter key. In the search bar, again, without the quotes, type "Flash". Look for the "Enable Ephemeral Flash Permissions" setting, and change it from "Default" to "Disabled". Click the "Relaunch Now" button. Chrome should now keep your Flash setting. As an altern