Google Chrome will be defaulting to using HTML5 rather than Adobe Flash on nearly all websites by the end of the year. The technology has been blighted by innumerable security holes in recent years. Google wants to reduce malicious attacks such as malvertising the rogue web adverts that can infect your computer with malware as you browse a legitimate website. Google has already announced it will drop support for the Flash-based online ads that some advertisers like to upload to Googles Adwords and DoubleClick services.”]
Source: https://grahamcluley.com/nail-flashs-coffin-google-chrome-block-flash-default-websites/