Websites will have to migrate existing Flash content and functionality to HTML and JavaScript once Adobe will stop supporting Flash with security updates and all browsers stop supporting Flash. Adobe will not issue Flash Player updates or security patches after the end of life date. * https://developer.mozilla.org/en/Plugins/Flash_to_HTML5 * https://developer.mozilla.org/en-US/docs/Plugins/Roadmap

Firefox doesn't need Flash for most sites. To get a sense of the impact of the end of Flash on your own browsing, consider how often you have seen this: <center><img src="https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2020-10-17-12-34-15-9b9634.png"></center> Firefox displays that notification icon if a site wants to use Flash, and the Flash-formatted content ''will not run'' until you click that icon and grant site-specific permission. If that doesn't sound familiar, the sites you visit are not using Flash -- or you have been ignoring the Flash content on those sites. In those cases, you won't be missing anything by not having Flash. If you ''do'' use content that runs on Flash -- for example, some online games -- you will lose access to that content unless/until the site updates it (hopefully they will soon). In case you are curious about Facebook Web Games, Facebook has given developers until the end of the year to convert their games from Flash to other technologies if they want to stay on Facebook. ([https://www.facebook.com/fbgaminghome/blog/flash-end-of-life-approaching-options-for-developers Blog post].) So you'll probably see those changes start to roll out in the next two months. Finally, please note that Microsoft plans to remove the Flash plugin from Windows through updates in January 2021 or afterwards: https://docs.microsoft.com/en-us/lifecycle/faq/adobe-flash-player#what-are-the-changes-expected-at-the-end-of-support