Google announced in a blog post today that Chrome will officially start to "de-emphasize Flash in favor of HTML5." VentureBeat reports: "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." Google detailed next month's plan (design doc), when Chrome 53 will be released: "In September 2015, we made 'Detect and run important plugin content' the default plugin setting in Chrome, automatically pausing any cross-origin plugin content smaller than 400px in width or 300px in height. This behavior has an exception for any plugin content that is 5x5 or smaller or is an undefined size, because there was no canonical way of detecting viewability until Intersection Observer was standardized and implemented. We would now like to remove this exception and instead not load tiny, cross-origin content. If the user has their plugin setting set to the default of 'Detect and run important plugin content,' the browser will not instantiate cross-origin plugin content that is roughly 5x5 or smaller or has an undefined size. An icon will be displayed in the URL bar indicating that plugin content is not running, allowing the user to reload the page with plugin content running or open settings to add a site-wide exception. Other choices of the plugin content setting are unaffected by this launch."