Microsoft recently announced plans to eventually stop the activation of Silverlight, Shockwave, and Flash content in Office 365. This is not just the developers disabling bugs with an option to click a link or button to look at content. Within a few months' time, Flash will be gone from Office 365 for good.
Google is out to make the user's experience more secure and efficient with its recent announcement that it will disable Flash and implement an HTML5 default browsing protocol. This change won't be implemented all at once, but will start by changing the settings of 1% of Chrome users in December 2016 before eventually expanding that number over the next year.