Google has shared more details of its plan to replace Flash with HTML5 by default in Chrome. In September 2016, Chrome will block Flash content that loads behind the scenes, which the company estimates accounts for more than 90 percent of the Flash on the web. In December, Chrome will make HTML5 the default experience for central content, such as games and videos, except on sites that only support Flash.

Flash has been on its way out for years. Not only is the tool a security nightmare, with new vulnerabilities popping up regularly, the market has been slowly but surely moving away from plugins in favor of HTML5. Chrome and Flash, in particular, have had a complicated relationship.