In this roadmap, Mozilla explains that they will be disabling support for the Flash plugin by default in 2019 and then completely remove support for Flash in 2020 to coincide with Adobe's official EOL timeframe. Firefox 84 Stable will be released on December 15, 2020, and Firefox 85 Stable on January 26, 2021. There won't be an option to restore Flash plugin support in Firefox 84 or newer. NPAPI plugins are a security risk because they run in the security context of the user and are not sandboxed or protected by the browser.įor this reason, Google has already removed support for NPAPI plugins in Chrome back in 2013. Mozilla will remove support for Adobe Flash in Firefox 84 85, and start the removal of NPAPI in Firefox 85 as well. To give time for developers and users to prepare for Flash's end-of-life, Mozilla posted a plugin roadmap for Firefox that provides a timeline showing how they plan on deprecating support for NPAPI browser plugins, especially the Flash plugin. In a coordinated announcement, major operating system and browser companies such as Microsoft, Google, Apple, and Mozilla announced a similar plan to block Adobe Flash from running within their software in 2020 as well.

In July 2017, Adobe announced that Adobe Flash would have an end-of-life in 2020 and that other technologies such as HTML5, WebAssembly, and WebGL have matured enough to fill the gap. This is being done as part of the roadmap set forth by Mozilla on how they will be ultimately disable all support for Flash in Firefox. Starting in Firefox 69, Mozilla will be disabling support for the Adobe Flash plugin by default.

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