Mobile: Contains Unsupported Plugins

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Contains Unsupported Plugins

Pages with browser plugins such as Flash, Silverlight, or Java Applets that most mobile devices and browsers do not support and search engines cannot index.

How to Analyse in the SEO Spider

View URLs with this issue in the ‘Mobile’ tab and ‘Unsupported Plugins’ filter.

What Triggers This Issue

This issue is triggered when pages have the following:

  • Flash – Any <object> tags with a type attribute that matches application/x-shockwave-flash or any <embed> tags where the src attributed ends with .swf..
  • Silverlight – Any <object> tags with a type attribute that matches application/x-silverlight.
  • Java applets – Any <applet> tags or <object> tags with a classid attribute, or any <embed> tags with a type attribute that matches application/x-java-applet.

How To Fix

Remove old plugin files from pages. For any pages that still rely on any of these plugins, migrate to more modern open web technologies, which are faster, more power-efficient and secure.

Consider converting plugin-based content to HTML, such as Flash to HTML5 video.

Further Reading

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