As you may remember, in 2017 Microsoft had announced that they will discontinue the Adobe Flash plugin and remove it from their browsers, Internet Explorer and Microsoft Edge. As of now, Microsoft has deprecated both the classic Edge app and Internet Explorer, and is actively working on the Chromium-based Edge version. The company has shared a few more details on what will happen in December 2020.
The company's plan is to disable Adobe Flash by default in Internet Explorer 11 and the classic Microsoft Edge in 2019, and then disable Flash completely at the end of 2020.
In the next version of Microsoft Edge (built on Chromium), we will continue to retire Flash in the same timeframe as other Chromium based browsers. You can learn more of that timeline in this blog post. Flash will initially be disabled, and the user will need to re-enable Flash on a site-by-site basis; Flash will be completely removed from the browser towards the end of 2020. Group policies are available for enterprise admins and IT pros to change the Flash behavior prior to that date.
For both the in-market version of Microsoft Edge (built on EdgeHTML) and Internet Explorer 11, the current experience will continue as-is through 2019. Specifically, we no longer intend to update either Microsoft Edge (built on EdgeHTML) or Internet Explorer 11 to disable Flash by default. We still plan to fully remove Flash from these browsers by December 2020, as originally communicated.
So, until December 2020 Internet Explorer 11 and EdgeHTML are two products you can use to play Flash content. All the mainstream browsers, including Chrome, Chromium-based browsers, and Mozilla Firefox are blocking Flash by default and marking it unsafe. Unlike them, Internet Explorer plays Flash content automatically. In case of the classic Microsoft Edge browser, the user has to click on the Flash block to activate it and play its content on a web site.