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This article describes the reasons for this error message and covers possible solutions and workarounds.

{for mac} {note}'''Note:''' This article does not apply to Mac.{/note} {/for} {for linux} {note}'''Note:''' This article does not apply to Linux.{/note} {/for} {for not fx20} {for win} [[Template:ApplytoFx|channel=release|slug=firefox]] {/for} {/for} If Firefox shows you a "Warning: Unresponsive plugin" prompt, it means that a plugin, like Flash, is taking longer than expected to do what you requested. This article covers some solutions and workarounds. ;[[Image:Firefox Plugin Hang UI]] __TOC__ = What action should I take? = If you get this warning once, you can try to click {button Continue} to give the plugin more time to complete your request. This may not always be successful. If you get this warning a second time you should probably click {button Stop plugin} to make the [[Send plugin crash reports to help Mozilla improve Firefox|plugin stop immediately (crash)]]. = Prevent plugins from hanging = Here's what to try if you get this warning often: *Update your plugins. [[T:plugincheck]] *Pause plugins (Flash videos, games, music, etc.) running in other tabs or close those tabs. **For more about Flash, see [[Flash Plugin - Keep it up to date and troubleshoot problems#w_playing-flash-videos-makes-firefox-hang|Playing Flash videos makes Firefox hang]]. {note}'''Note:''' If you only see this warning on a certain website, your Internet security software may be blocking the content. View the log files for your Internet security software or contact the software provider, to see if content from the website is being blocked.{/note} = Disable this warning = If you don't want to be warned when a plugin hangs, you can disable this warning by checking the "Don't ask me again" checkbox. When you do that, Firefox will allow the plugin to hang for up to 45 seconds before it [[Send plugin crash reports to help Mozilla improve Firefox|crashes]]. If you change your mind and want to re-enable the warning, do the following: # [[T:aboutconfig]] # In the about:config page, search for the preference {pref dom.ipc.plugins.hangUITimeoutSecs}. #[[Template:contextmenu]] on it and choose {menu Reset}. [[Template:ShareArticle|link=http://mzl.la/12yL8YG]]