Google aims to block Flash by default for Chrome users, except for 10 white-listed sites

The transition is to be completed by the fourth quarter

Google aims to make HTML5 the primary experience in Chrome by the fourth quarter of this year, except for a white-list of 10 sites that will run Adobe’s Flash Player.

Under the plan revealed by Google, called “HTML5 by Default,” the Chrome browser will continue to ship with Adobe’s Flash Player, but its presence will not be advertised by default.

If a website offers HTML5, that will be the default experience. For those sites that need Flash, a prompt will show up at the top of the page when the user first visits the site.

The prompt will give users the option of running or declining to run Flash on the site. “If the user accepts, Chrome will advertise the presence of Flash Player and refresh the page,” Google said. On subsequent visits to the domain, the user's initial choice is likely to hold good, though Google is still working on the options for future prompts.

Once critical for rich media on the Web, Flash has been sidelined by HTML5, which has emerged as a serious competitor with Google and other players backing it. HTML5 provides a more integrated media experience with faster load times and lower power consumption, claims Google, which earlier this year said it would block the upload of display ads built in Flash from June 30 in AdWords and DoubleClick Digital Marketing, besides taking other measures to reduce the role of the player.  The Flash Player’s track record for vulnerabilities has also not been good, exposing users to a variety of threats.

In November, Adobe Systems said it would offer tools for developing HTML5 content, while continuing to support Flash content, as “open standards like HTML5 have matured and provide many of the capabilities that Flash ushered in.” While standards like HTML5 will be the Web platform of the future across all devices, Flash continues to be used in key categories like Web gaming and premium video, where new standards are yet to fully mature, it added.

Chrome will initially ship with a white-list of the top 10 sites using Flash, sorted by aggregate usage of a specific domain. This will include sites like,, and The white list will continue for one year and the list will be periodically updated to remove sites whose usage no longer requires the special treatment.

Enterprises will also be given a policy option to always run Flash content.

Join the CSO newsletter!

Error: Please check your email address.

More about Adobe SystemsAmazon.comDoubleClickFacebookGoogle

Show Comments

Featured Whitepapers

Editor's Recommendations

Solution Centres

Stories by John Ribeiro

Latest Videos

  • 150x50

    CSO Webinar: Will your data protection strategy be enough when disaster strikes?

    Speakers: - Paul O’Connor, Engagement leader - Performance Audit Group, Victorian Auditor-General’s Office (VAGO) - Nigel Phair, Managing Director, Centre for Internet Safety - Joshua Stenhouse, Technical Evangelist, Zerto - Anthony Caruana, CSO MC & Moderator

    Play Video

  • 150x50

    CSO Webinar: The Human Factor - Your people are your biggest security weakness

    ​Speakers: David Lacey, Researcher and former CISO Royal Mail David Turner - Global Risk Management Expert Mark Guntrip - Group Manager, Email Protection, Proofpoint

    Play Video

  • 150x50

    CSO Webinar: Current ransomware defences are failing – but machine learning can drive a more proactive solution

    Speakers • Ty Miller, Director, Threat Intelligence • Mark Gregory, Leader, Network Engineering Research Group, RMIT • Jeff Lanza, Retired FBI Agent (USA) • Andy Solterbeck, VP Asia Pacific, Cylance • David Braue, CSO MC/Moderator What to expect: ​Hear from industry experts on the local and global ransomware threat landscape. Explore a new approach to dealing with ransomware using machine-learning techniques and by thinking about the problem in a fundamentally different way. Apply techniques for gathering insight into ransomware behaviour and find out what elements must go into a truly effective ransomware defence. Get a first-hand look at how ransomware actually works in practice, and how machine-learning techniques can pick up on its activities long before your employees do.

    Play Video

  • 150x50

    CSO Webinar: Get real about metadata to avoid a false sense of security

    Speakers: • Anthony Caruana – CSO MC and moderator • Ian Farquhar, Worldwide Virtual Security Team Lead, Gigamon • John Lindsay, Former CTO, iiNet • Skeeve Stevens, Futurist, Future Sumo • David Vaile - Vice chair of APF, Co-Convenor of the Cyberspace Law And Policy Community, UNSW Law Faculty This webinar covers: - A 101 on metadata - what it is and how to use it - Insight into a typical attack, what happens and what we would find when looking into the metadata - How to collect metadata, use this to detect attacks and get greater insight into how you can use this to protect your organisation - Learn how much raw data and metadata to retain and how long for - Get a reality check on how you're using your metadata and if this is enough to secure your organisation

    Play Video

  • 150x50

    CSO Webinar: How banking trojans work and how you can stop them

    CSO Webinar: How banking trojans work and how you can stop them Featuring: • John Baird, Director of Global Technology Production, Deutsche Bank • Samantha Macleod, GM Cyber Security, ME Bank • Sherrod DeGrippo, Director of Emerging Threats, Proofpoint (USA)

    Play Video

More videos

Blog Posts

Market Place