Tonight kept getting what I guess is a pop-up, though opening in a new tab - while watching music videos on youtube - to upgrade flash player to an HD version. It is not from Adobe and says so, but says it is compatible and includes security upgrades. Got it 3 times and closed it each time. Anyone else? This started occurring just after an automatic Firefox update was downloaded and installed. Don't know they are related. Could be coinsidental. If it matters, I have an iMac operating system OS X 10.8.5 Have the option of updating free to Maverick but was advised to not do so.
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