I've had similar issues with Adobe Flash as well. Mostly severe lag as it attempts to download and play every single embedded advertisement on any given page... very annoying. I really wish there were an option to disable it while on certain pages or performing certain actions but to my knowledge that option does not exist. I even downloaded addons specifically designed to control Adobe Flash to no avail. Adobe seems to bypass any action taken to prevent it from running almost like a virus. I'm sorry to say that the only solution I have found is to uninstall Adobe Flash completely.