Why do Java, Silverlight, Adobe Acrobat and other plugins no longer work?

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  • Revision id: 136310
  • Created:
  • Creator: AliceWyman
  • Comment: content of PluginSupportEOL template added for not fx52
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: AliceWyman
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: No
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Mozilla plans to drop support for all NPAPI plugins except for Flash in March 2017, when Firefox version 52 is released. See this article and this blog post for details.

Beginning in version 52, Firefox no longer loads NPAPI plugins except Adobe Flash. Some plugins that are no longer supported include Silverlight, Java, and Adobe Acrobat.

Over the past few years, Firefox has implemented various Web APIs so that websites can do the same things they’ve always done without plugins, so you will most likely not notice any change to your browsing experience.

Why did Firefox do this?

The internet is full of websites that go beyond static pages, such as video, sound and games. NPAPI plugins, especially Flash, have helped enable these interactive pages. But they also make your browsing slower, less secure and more likely to crash.

Over the past few years, Firefox has worked hard to build replacements for these plugins. Together, they are called Web APIs. They are designed to replace the function of these plugins without undermining your internet security, stability and performance.

Before, these Web APIs weren’t quite ready, so Firefox started the transition by making plugins load manually (click to activate).

Today, they’re ready. Many sites have adopted them, and almost all your favourite pages can be enjoyed without using old and insecure plugins. Firefox joins other modern browsers like Google Chrome and Microsoft Edge to remove support for these NPAPI plugins.

I’m having problems

In case you’re not yet ready for this transition to happen, the ESR (Extended Support Release) of Firefox 52 will continue to support these plugins until early 2018. Click here to download Firefox ESR.