Earlier this year, Google announced that it would no longer accept Flash-based ads for its AdWords and DoubleClick services. By the end of 2016, Google intends to change how its Chrome browser supports Flash content on websites, effectively phasing out the plugin in most instances.
The company prefers HTML5 content over Flash for security reasons, faster load times, and lower power consumption, so the company plans to have Chrome use HTML5 by default wherever the option is available. Many sites still use Flash, though, so Chrome will continue to ship with Flash Player. When users visit a site that requires Flash, Chrome will present a prompt giving them the option of running Flash for that specific site. Chrome will remember users' choices, and load Flash on subsequent visits.
This approach might over-prompt users, so the company has put together a temporary "whitelist" of popular sites that use Flash. These sites will be exempt from the new changes for a year. The list is formed from the top ten domains that use Flash, and includes YouTube, Facebook, Yahoo, Twitch.tv, and Amazon.com.
Google has also created a method of handling sites like Pandora that direct users to download the Flash Player when the browser doesn't indicate it's an available plugin. When users click the download link, Chrome will intercept the request and cancel the navigation. Then, the user will be shown an "Allow Flash Player" prompt as with other sites.